21037963705 has 8 divisors (see below), whose sum is σ = 27540607104. Its totient is φ = 15300337200.

The previous prime is 21037963657. The next prime is 21037963729. The reversal of 21037963705 is 50736973012.

It is a happy number.

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

It is not a de Polignac number, because 21037963705 - 2¹¹ = 21037961657 is a prime.

It is a Duffinian 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, 191254161 + ... + 191254270.

It is an arithmetic number, because the mean of its divisors is an integer number (3442575888).

Almost surely, 2^21037963705 is an apocalyptic number.

It is an amenable number.

21037963705 is a deficient number, since it is larger than the sum of its proper divisors (6502643399).

21037963705 is a wasteful number, since it uses less digits than its factorization.

21037963705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382508447.

The product of its (nonzero) digits is 238140, while the sum is 43.

The spelling of 21037963705 in words is "twenty-one billion, thirty-seven million, nine hundred sixty-three thousand, seven hundred five".