20900485903 has 8 divisors (see below), whose sum is σ = 22838601600. Its totient is φ = 18968715480.

The previous prime is 20900485847. The next prime is 20900485939. The reversal of 20900485903 is 30958400902.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20900485903 - 2²⁹ = 20363614991 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 (20900485993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1579425 + ... + 1592602.

It is an arithmetic number, because the mean of its divisors is an integer number (2854825200).

Almost surely, 2^20900485903 is an apocalyptic number.

20900485903 is a deficient number, since it is larger than the sum of its proper divisors (1938115697).

20900485903 is a wasteful number, since it uses less digits than its factorization.

20900485903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172637.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 20900485903 in words is "twenty billion, nine hundred million, four hundred eighty-five thousand, nine hundred three".