2051394920 has 16 divisors (see below), whose sum is σ = 4615638660. Its totient is φ = 820557952.

The previous prime is 2051394911. The next prime is 2051394923. The reversal of 2051394920 is 294931502.

It can be written as a sum of positive squares in 2 ways, for example, as 1915112644 + 136282276 = 43762^2 + 11674^2 .

It is a super-2 number, since 2×2051394920² = 8416442235603612800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2051394923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25642397 + ... + 25642476.

Almost surely, 2^2051394920 is an apocalyptic number.

2051394920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2051394920 is an abundant number, since it is smaller than the sum of its proper divisors (2564243740).

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

2051394920 is a wasteful number, since it uses less digits than its factorization.

2051394920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51284884 (or 51284880 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 2051394920 is about 45292.3273855517. The cubic root of 2051394920 is about 1270.6221598721.

The spelling of 2051394920 in words is "two billion, fifty-one million, three hundred ninety-four thousand, nine hundred twenty".