21337123400 has 48 divisors (see below), whose sum is σ = 49654790640. Its totient is φ = 8526939200.

The previous prime is 21337123369. The next prime is 21337123427. The reversal of 21337123400 is 432173312.

It is a self number, because there is not a number n which added to its sum of digits gives 21337123400.

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, 169307 + ... + 267093.

It is an arithmetic number, because the mean of its divisors is an integer number (1034474805).

Almost surely, 2^21337123400 is an apocalyptic number.

21337123400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21337123400 is an abundant number, since it is smaller than the sum of its proper divisors (28317667240).

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

21337123400 is a wasteful number, since it uses less digits than its factorization.

21337123400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98894 (or 98885 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

Adding to 21337123400 its reverse (432173312), we get a palindrome (21769296712).

The spelling of 21337123400 in words is "twenty-one billion, three hundred thirty-seven million, one hundred twenty-three thousand, four hundred".