21663073413400 has 48 divisors (see below), whose sum is σ = 53017521784200. Its totient is φ = 8209164660480.

The previous prime is 21663073413391. The next prime is 21663073413407. The reversal of 21663073413400 is 431437036612.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21663073413407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2850400597 + ... + 2850408196.

Almost surely, 2^{21663073413400} is an apocalyptic number.

21663073413400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21663073413400 is an abundant number, since it is smaller than the sum of its proper divisors (31354448370800).

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

21663073413400 is a wasteful number, since it uses less digits than its factorization.

21663073413400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5700808828 (or 5700808819 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 40.

The spelling of 21663073413400 in words is "twenty-one trillion, six hundred sixty-three billion, seventy-three million, four hundred thirteen thousand, four hundred".