20660153501 has 24 divisors (see below), whose sum is σ = 23168032776. Its totient is φ = 18403856640.

The previous prime is 20660153483. The next prime is 20660153543. The reversal of 20660153501 is 10535106602.

It can be written as a sum of positive squares in 12 ways, for example, as 19755708025 + 904445476 = 140555^2 + 30074^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20660153501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20660153561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 527471 + ... + 565283.

It is an arithmetic number, because the mean of its divisors is an integer number (965334699).

Almost surely, 2^20660153501 is an apocalyptic number.

It is an amenable number.

20660153501 is a deficient number, since it is larger than the sum of its proper divisors (2507879275).

20660153501 is a wasteful number, since it uses less digits than its factorization.

20660153501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37953 (or 37940 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 20660153501 in words is "twenty billion, six hundred sixty million, one hundred fifty-three thousand, five hundred one".