21374285400 has 192 divisors, whose sum is σ = 79286071200. Its totient is φ = 5261345280.

The previous prime is 21374285399. The next prime is 21374285407. The reversal of 21374285400 is 458247312.

It is a happy number.

21374285400 is a `hidden beast` number, since 2 + 1 + 374 + 285 + 4 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21374285407) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82039 + ... + 222438.

Almost surely, 2^21374285400 is an apocalyptic number.

21374285400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21374285400 is an abundant number, since it is smaller than the sum of its proper divisors (57911785800).

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

21374285400 is a wasteful number, since it uses less digits than its factorization.

21374285400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304515 (or 304500 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 21374285400 in words is "twenty-one billion, three hundred seventy-four million, two hundred eighty-five thousand, four hundred".