20400033123200 has 96 divisors (see below), whose sum is σ = 50534834202000. Its totient is φ = 8137282949120.

The previous prime is 20400033123149. The next prime is 20400033123233. The reversal of 20400033123200 is 232133000402.

It is a super-2 number, since 2×20400033123200² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

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, 7730045 + ... + 10027644.

Almost surely, 2^{20400033123200} is an apocalyptic number.

20400033123200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20400033123200 is an abundant number, since it is smaller than the sum of its proper divisors (30134801078800).

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

20400033123200 is a wasteful number, since it uses less digits than its factorization.

20400033123200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17758072 (or 17758055 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20400033123200 its reverse (232133000402), we get a palindrome (20632166123602).

The spelling of 20400033123200 in words is "twenty trillion, four hundred billion, thirty-three million, one hundred twenty-three thousand, two hundred".