21237070711 has 8 divisors (see below), whose sum is σ = 21314109024. Its totient is φ = 21160089120.

The previous prime is 21237070637. The next prime is 21237070717. The reversal of 21237070711 is 11707073212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21237070711 - 2¹⁹ = 21236546423 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 (21237070717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824845 + ... + 850201.

It is an arithmetic number, because the mean of its divisors is an integer number (2664263628).

Almost surely, 2^21237070711 is an apocalyptic number.

21237070711 is a deficient number, since it is larger than the sum of its proper divisors (77038313).

21237070711 is a wasteful number, since it uses less digits than its factorization.

21237070711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28361.

The product of its (nonzero) digits is 4116, while the sum is 31.

It can be divided in two parts, 21 and 237070711, that added together give a palindrome (237070732).

The spelling of 21237070711 in words is "twenty-one billion, two hundred thirty-seven million, seventy thousand, seven hundred eleven".