20942924085 has 32 divisors (see below), whose sum is σ = 37862928000. Its totient is φ = 10980240768.

The previous prime is 20942924081. The next prime is 20942924117. The reversal of 20942924085 is 58042924902.

It is not a de Polignac number, because 20942924085 - 2² = 20942924081 is a prime.

It is a super-3 number, since 3×20942924085³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20942924085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20942924081) 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, 1306720 + ... + 1322649.

It is an arithmetic number, because the mean of its divisors is an integer number (1183216500).

Almost surely, 2^20942924085 is an apocalyptic number.

It is an amenable number.

20942924085 is a deficient number, since it is larger than the sum of its proper divisors (16920003915).

20942924085 is a wasteful number, since it uses less digits than its factorization.

20942924085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629442 (or 2629436 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 20942924085 in words is "twenty billion, nine hundred forty-two million, nine hundred twenty-four thousand, eighty-five".