21002670711 has 30 divisors (see below), whose sum is σ = 34485882816. Its totient is φ = 12728885400.

The previous prime is 21002670691. The next prime is 21002670719. The reversal of 21002670711 is 11707620012.

It is not a de Polignac number, because 21002670711 - 2⁷ = 21002670583 is a prime.

It is a super-2 number, since 2×21002670711² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002670719) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1061655 + ... + 1081256.

Almost surely, 2^21002670711 is an apocalyptic number.

21002670711 is a deficient number, since it is larger than the sum of its proper divisors (13483212105).

21002670711 is a wasteful number, since it uses less digits than its factorization.

21002670711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142945 (or 2142925 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The spelling of 21002670711 in words is "twenty-one billion, two million, six hundred seventy thousand, seven hundred eleven".