20507372571 has 8 divisors (see below), whose sum is σ = 31249329664. Its totient is φ = 11718498600.

The previous prime is 20507372537. The next prime is 20507372573. The reversal of 20507372571 is 17527370502.

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

It is not a de Polignac number, because 20507372571 - 2¹⁵ = 20507339803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20507372573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488270755 + ... + 488270796.

It is an arithmetic number, because the mean of its divisors is an integer number (3906166208).

Almost surely, 2^20507372571 is an apocalyptic number.

20507372571 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20507372571 is a deficient number, since it is larger than the sum of its proper divisors (10741957093).

20507372571 is an equidigital number, since it uses as much as digits as its factorization.

20507372571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976541561.

The product of its (nonzero) digits is 102900, while the sum is 39.

The spelling of 20507372571 in words is "twenty billion, five hundred seven million, three hundred seventy-two thousand, five hundred seventy-one".