20645150501 has 16 divisors (see below), whose sum is σ = 21083251200. Its totient is φ = 20211984000.

The previous prime is 20645150479. The next prime is 20645150527. The reversal of 20645150501 is 10505154602.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20645150501 - 2¹⁰ = 20645149477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20645159501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8456441 + ... + 8458881.

It is an arithmetic number, because the mean of its divisors is an integer number (1317703200).

Almost surely, 2^20645150501 is an apocalyptic number.

It is an amenable number.

20645150501 is a deficient number, since it is larger than the sum of its proper divisors (438100699).

20645150501 is a wasteful number, since it uses less digits than its factorization.

20645150501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3380.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 20645150501 in words is "twenty billion, six hundred forty-five million, one hundred fifty thousand, five hundred one".