21137006951 has 2 divisors, whose sum is σ = 21137006952. Its totient is φ = 21137006950.

The previous prime is 21137006939. The next prime is 21137006953. The reversal of 21137006951 is 15960073112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21137006951 - 2⁶ = 21137006887 is a prime.

Together with 21137006953, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21137006953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10568503475 + 10568503476.

It is an arithmetic number, because the mean of its divisors is an integer number (10568503476).

Almost surely, 2^21137006951 is an apocalyptic number.

21137006951 is a deficient number, since it is larger than the sum of its proper divisors (1).

21137006951 is an equidigital number, since it uses as much as digits as its factorization.

21137006951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The spelling of 21137006951 in words is "twenty-one billion, one hundred thirty-seven million, six thousand, nine hundred fifty-one".