21031653883 has 2 divisors, whose sum is σ = 21031653884. Its totient is φ = 21031653882.

The previous prime is 21031653829. The next prime is 21031653901. The reversal of 21031653883 is 38835613012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21031653883 - 2⁹ = 21031653371 is a prime.

It is not a weakly prime, because it can be changed into another prime (21031653803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515826941 + 10515826942.

It is an arithmetic number, because the mean of its divisors is an integer number (10515826942).

Almost surely, 2^21031653883 is an apocalyptic number.

21031653883 is a deficient number, since it is larger than the sum of its proper divisors (1).

21031653883 is an equidigital number, since it uses as much as digits as its factorization.

21031653883 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 21031653883 in words is "twenty-one billion, thirty-one million, six hundred fifty-three thousand, eight hundred eighty-three".