21692403207 has 14 divisors (see below), whose sum is σ = 32523727712. Its totient is φ = 14461601652.

The previous prime is 21692403203. The next prime is 21692403277. The reversal of 21692403207 is 70230429612.

It is not a de Polignac number, because 21692403207 - 2² = 21692403203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21692403203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 14877463 + ... + 14878920.

It is an arithmetic number, because the mean of its divisors is an integer number (2323123408).

Almost surely, 2^21692403207 is an apocalyptic number.

21692403207 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

21692403207 is a deficient number, since it is larger than the sum of its proper divisors (10831324505).

21692403207 is an frugal number, since it uses more digits than its factorization.

21692403207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29756401 (or 29756386 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 21692403207 in words is "twenty-one billion, six hundred ninety-two million, four hundred three thousand, two hundred seven".