20124403400 has 48 divisors (see below), whose sum is σ = 47146469040. Its totient is φ = 7988302400.

The previous prime is 20124403391. The next prime is 20124403417. The reversal of 20124403400 is 430442102.

It is a super-2 number, since 2×20124403400² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 357854 + ... + 410253.

It is an arithmetic number, because the mean of its divisors is an integer number (982218105).

Almost surely, 2^20124403400 is an apocalyptic number.

20124403400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20124403400 is an abundant number, since it is smaller than the sum of its proper divisors (27022065640).

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

20124403400 is a wasteful number, since it uses less digits than its factorization.

20124403400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768254 (or 768245 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20124403400 its reverse (430442102), we get a palindrome (20554845502).

The spelling of 20124403400 in words is "twenty billion, one hundred twenty-four million, four hundred three thousand, four hundred".