20756484015 has 12 divisors (see below), whose sum is σ = 33211267224. Its totient is φ = 11069827216.

The previous prime is 20756483977. The next prime is 20756484017. The reversal of 20756484015 is 51048465702.

It is a happy number.

It is not a de Polignac number, because 20756484015 - 2¹⁰ = 20756482991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20756484017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 539386 + ... + 576584.

It is an arithmetic number, because the mean of its divisors is an integer number (2767605602).

Almost surely, 2^20756484015 is an apocalyptic number.

20756484015 is a deficient number, since it is larger than the sum of its proper divisors (12454783209).

20756484015 is an frugal number, since it uses more digits than its factorization.

20756484015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74406 (or 37207 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 42.

The spelling of 20756484015 in words is "twenty billion, seven hundred fifty-six million, four hundred eighty-four thousand, fifteen".