20423133717 has 16 divisors (see below), whose sum is σ = 31124324352. Its totient is φ = 11669102640.

The previous prime is 20423133677. The next prime is 20423133721. The reversal of 20423133717 is 71733132402.

It is not a de Polignac number, because 20423133717 - 2⁷ = 20423133589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423133727) 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, 168348 + ... + 263034.

It is an arithmetic number, because the mean of its divisors is an integer number (1945270272).

Almost surely, 2^20423133717 is an apocalyptic number.

It is an amenable number.

20423133717 is a deficient number, since it is larger than the sum of its proper divisors (10701190635).

20423133717 is a wasteful number, since it uses less digits than its factorization.

20423133717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104968.

The product of its (nonzero) digits is 21168, while the sum is 33.

The spelling of 20423133717 in words is "twenty billion, four hundred twenty-three million, one hundred thirty-three thousand, seven hundred seventeen".