20901794485 has 32 divisors (see below), whose sum is σ = 30417730560. Its totient is φ = 13579315200.

The previous prime is 20901794471. The next prime is 20901794497. The reversal of 20901794485 is 58449710902.

It is not a de Polignac number, because 20901794485 - 2²¹ = 20899697333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 449340 + ... + 493669.

It is an arithmetic number, because the mean of its divisors is an integer number (950554080).

Almost surely, 2^20901794485 is an apocalyptic number.

It is an amenable number.

20901794485 is a deficient number, since it is larger than the sum of its proper divisors (9515936075).

20901794485 is a wasteful number, since it uses less digits than its factorization.

20901794485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943069.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 20901794485 in words is "twenty billion, nine hundred one million, seven hundred ninety-four thousand, four hundred eighty-five".