20313020 has 48 divisors (see below), whose sum is σ = 52506048. Its totient is φ = 6428160.

The previous prime is 20313001. The next prime is 20313047. The reversal of 20313020 is 2031302.

It is a junction number, because it is equal to n+sod(n) for n = 20312992 and 20313010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3761 + ... + 7400.

It is an arithmetic number, because the mean of its divisors is an integer number (1093876).

Almost surely, 2^20313020 is an apocalyptic number.

20313020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20313020 is an abundant number, since it is smaller than the sum of its proper divisors (32193028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20313020 is a wasteful number, since it uses less digits than its factorization.

20313020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11190 (or 11188 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 20313020 is about 4506.9967827812. The cubic root of 20313020 is about 272.8505490502.

Adding to 20313020 its reverse (2031302), we get a palindrome (22344322).

The spelling of 20313020 in words is "twenty million, three hundred thirteen thousand, twenty".