21192967 has 2 divisors, whose sum is σ = 21192968. Its totient is φ = 21192966.

The previous prime is 21192953. The next prime is 21192989. The reversal of 21192967 is 76929112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21192967 - 2⁷ = 21192839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10596483 + 10596484.

It is an arithmetic number, because the mean of its divisors is an integer number (10596484).

Almost surely, 2^21192967 is an apocalyptic number.

21192967 is a deficient number, since it is larger than the sum of its proper divisors (1).

21192967 is an equidigital number, since it uses as much as digits as its factorization.

21192967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 21192967 is about 4603.5819749408. The cubic root of 21192967 is about 276.7348921274.

The spelling of 21192967 in words is "twenty-one million, one hundred ninety-two thousand, nine hundred sixty-seven".