20401154020 has 24 divisors (see below), whose sum is σ = 46137995064. Its totient is φ = 7532733696.

The previous prime is 20401153979. The next prime is 20401154023. The reversal of 20401154020 is 2045110402.

It can be written as a sum of positive squares in 4 ways, for example, as 21307456 + 20379846564 = 4616^2 + 142758^2 .

It is not an unprimeable number, because it can be changed into a prime (20401154023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39232729 + ... + 39233248.

It is an arithmetic number, because the mean of its divisors is an integer number (1922416461).

Almost surely, 2^20401154020 is an apocalyptic number.

20401154020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20401154020 is an abundant number, since it is smaller than the sum of its proper divisors (25736841044).

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

20401154020 is a wasteful number, since it uses less digits than its factorization.

20401154020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78465999 (or 78465997 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 20401154020 its reverse (2045110402), we get a palindrome (22446264422).

The spelling of 20401154020 in words is "twenty billion, four hundred one million, one hundred fifty-four thousand, twenty".