21402311200 has 72 divisors (see below), whose sum is σ = 52736905872. Its totient is φ = 8480881920.

The previous prime is 21402311159. The next prime is 21402311201. The reversal of 21402311200 is 211320412.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (21402311201) 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, 39414 + ... + 210613.

It is an arithmetic number, because the mean of its divisors is an integer number (732457026).

Almost surely, 2^21402311200 is an apocalyptic number.

21402311200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21402311200 is an abundant number, since it is smaller than the sum of its proper divisors (31334594672).

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

21402311200 is a wasteful number, since it uses less digits than its factorization.

21402311200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250154 (or 250141 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21402311200 its reverse (211320412), we get a palindrome (21613631612).

The spelling of 21402311200 in words is "twenty-one billion, four hundred two million, three hundred eleven thousand, two hundred".