21400695 has 72 divisors (see below), whose sum is σ = 41408640. Its totient is φ = 10200960.

The previous prime is 21400681. The next prime is 21400723. The reversal of 21400695 is 59600412.

It is not a de Polignac number, because 21400695 - 2¹¹ = 21398647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 690330 + ... + 690360.

It is an arithmetic number, because the mean of its divisors is an integer number (575120).

Almost surely, 2^21400695 is an apocalyptic number.

21400695 is a deficient number, since it is larger than the sum of its proper divisors (20007945).

21400695 is a wasteful number, since it uses less digits than its factorization.

21400695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 21400695 is about 4626.0885205538. The cubic root of 21400695 is about 277.6361153518.

The spelling of 21400695 in words is "twenty-one million, four hundred thousand, six hundred ninety-five".