20790521583 has 16 divisors (see below), whose sum is σ = 31151016960. Its totient is φ = 12237898464.

The previous prime is 20790521567. The next prime is 20790521599. The reversal of 20790521583 is 38512509702.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20790521567) and next prime (20790521599).

It is not a de Polignac number, because 20790521583 - 2⁴ = 20790521567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20790521533) 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, 11588023 + ... + 11589816.

It is an arithmetic number, because the mean of its divisors is an integer number (1946938560).

Almost surely, 2^20790521583 is an apocalyptic number.

20790521583 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20790521583 is a deficient number, since it is larger than the sum of its proper divisors (10360495377).

20790521583 is a wasteful number, since it uses less digits than its factorization.

20790521583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23177878.

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 20790521583 in words is "twenty billion, seven hundred ninety million, five hundred twenty-one thousand, five hundred eighty-three".