21700770015 has 8 divisors (see below), whose sum is σ = 34721232048. Its totient is φ = 11573744000.

The previous prime is 21700769971. The next prime is 21700770031. The reversal of 21700770015 is 51007700712.

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

It is not a de Polignac number, because 21700770015 - 2¹⁹ = 21700245727 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723358986 + ... + 723359015.

It is an arithmetic number, because the mean of its divisors is an integer number (4340154006).

Almost surely, 2^21700770015 is an apocalyptic number.

21700770015 is a deficient number, since it is larger than the sum of its proper divisors (13020462033).

21700770015 is a wasteful number, since it uses less digits than its factorization.

21700770015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446718009.

The product of its (nonzero) digits is 3430, while the sum is 30.

The spelling of 21700770015 in words is "twenty-one billion, seven hundred million, seven hundred seventy thousand, fifteen".