21007763315 has 32 divisors (see below), whose sum is σ = 31962539520. Its totient is φ = 12873772800.

The previous prime is 21007763233. The next prime is 21007763333. The reversal of 21007763315 is 51336770012.

It is not a de Polignac number, because 21007763315 - 2¹² = 21007759219 is a prime.

It is a super-2 number, since 2×21007763315² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 439706 + ... + 485135.

It is an arithmetic number, because the mean of its divisors is an integer number (998829360).

Almost surely, 2^21007763315 is an apocalyptic number.

21007763315 is a deficient number, since it is larger than the sum of its proper divisors (10954776205).

21007763315 is a wasteful number, since it uses less digits than its factorization.

21007763315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924923.

The product of its (nonzero) digits is 26460, while the sum is 35.

The spelling of 21007763315 in words is "twenty-one billion, seven million, seven hundred sixty-three thousand, three hundred fifteen".