20400344510 has 128 divisors (see below), whose sum is σ = 45898997760. Its totient is φ = 6356496384.

The previous prime is 20400344473. The next prime is 20400344513. The reversal of 20400344510 is 1544300402.

20400344510 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×20400344510² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400344513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21096047 + ... + 21097013.

It is an arithmetic number, because the mean of its divisors is an integer number (358585920).

Almost surely, 2^20400344510 is an apocalyptic number.

20400344510 is an abundant number, since it is smaller than the sum of its proper divisors (25498653250).

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

20400344510 is a wasteful number, since it uses less digits than its factorization.

20400344510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 20400344510 its reverse (1544300402), we get a palindrome (21944644912).

The spelling of 20400344510 in words is "twenty billion, four hundred million, three hundred forty-four thousand, five hundred ten".