21400106570 has 16 divisors (see below), whose sum is σ = 38522511360. Its totient is φ = 8559527184.

The previous prime is 21400106569. The next prime is 21400106627. The reversal of 21400106570 is 7560100412.

It is a super-2 number, since 2×21400106570² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141191 + ... + 250469.

It is an arithmetic number, because the mean of its divisors is an integer number (2407656960).

Almost surely, 2^21400106570 is an apocalyptic number.

21400106570 is a deficient number, since it is larger than the sum of its proper divisors (17122404790).

21400106570 is a wasteful number, since it uses less digits than its factorization.

21400106570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128869.

The product of its (nonzero) digits is 1680, while the sum is 26.

Adding to 21400106570 its reverse (7560100412), we get a palindrome (28960206982).

The spelling of 21400106570 in words is "twenty-one billion, four hundred million, one hundred six thousand, five hundred seventy".