20402153064 has 48 divisors (see below), whose sum is σ = 55274321700. Its totient is φ = 6798441984.

The previous prime is 20402153021. The next prime is 20402153129. The reversal of 20402153064 is 46035120402.

It can be written as a sum of positive squares in 2 ways, for example, as 14554492164 + 5847660900 = 120642^2 + 76470^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 176542 + ... + 268274.

Almost surely, 2^20402153064 is an apocalyptic number.

20402153064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20402153064 is an abundant number, since it is smaller than the sum of its proper divisors (34872168636).

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

20402153064 is a wasteful number, since it uses less digits than its factorization.

20402153064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94834 (or 94827 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 20402153064 its reverse (46035120402), we get a palindrome (66437273466).

The spelling of 20402153064 in words is "twenty billion, four hundred two million, one hundred fifty-three thousand, sixty-four".