2051154020 has 12 divisors (see below), whose sum is σ = 4307423484. Its totient is φ = 820461600.

The previous prime is 2051153983. The next prime is 2051154059. The reversal of 2051154020 is 204511502.

It can be written as a sum of positive squares in 2 ways, for example, as 634233856 + 1416920164 = 25184^2 + 37642^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 102557701 = 2051154020 / (2 + 0 + 5 + 1 + 1 + 5 + 4 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 2051153983 and 2051154001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51278831 + ... + 51278870.

It is an arithmetic number, because the mean of its divisors is an integer number (358951957).

Almost surely, 2^2051154020 is an apocalyptic number.

2051154020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2051154020 is an abundant number, since it is smaller than the sum of its proper divisors (2256269464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2051154020 is a wasteful number, since it uses less digits than its factorization.

2051154020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102557710 (or 102557708 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2051154020 is about 45289.6679166452. The cubic root of 2051154020 is about 1270.5724205691.

Adding to 2051154020 its reverse (204511502), we get a palindrome (2255665522).

The spelling of 2051154020 in words is "two billion, fifty-one million, one hundred fifty-four thousand, twenty".