20507343153 has 32 divisors (see below), whose sum is σ = 29967570432. Its totient is φ = 12371049600.

The previous prime is 20507343121. The next prime is 20507343179. The reversal of 20507343153 is 35134370502.

It is not a de Polignac number, because 20507343153 - 2⁵ = 20507343121 is a prime.

It is a super-2 number, since 2×20507343153² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20507343953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7176501 + ... + 7179357.

It is an arithmetic number, because the mean of its divisors is an integer number (936486576).

Almost surely, 2^20507343153 is an apocalyptic number.

It is an amenable number.

20507343153 is a deficient number, since it is larger than the sum of its proper divisors (9460227279).

20507343153 is a wasteful number, since it uses less digits than its factorization.

20507343153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3805.

The product of its (nonzero) digits is 37800, while the sum is 33.

The spelling of 20507343153 in words is "twenty billion, five hundred seven million, three hundred forty-three thousand, one hundred fifty-three".