21364400102 has 32 divisors (see below), whose sum is σ = 32972294784. Its totient is φ = 10376553600.

The previous prime is 21364400063. The next prime is 21364400111. The reversal of 21364400102 is 20100446312.

It is a super-2 number, since 2×21364400102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16548077 + ... + 16549367.

It is an arithmetic number, because the mean of its divisors is an integer number (1030384212).

Almost surely, 2^21364400102 is an apocalyptic number.

21364400102 is a deficient number, since it is larger than the sum of its proper divisors (11607894682).

21364400102 is a wasteful number, since it uses less digits than its factorization.

21364400102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21364400102 its reverse (20100446312), we get a palindrome (41464846414).

The spelling of 21364400102 in words is "twenty-one billion, three hundred sixty-four million, four hundred thousand, one hundred two".