20020920 has 32 divisors (see below), whose sum is σ = 60063120. Its totient is φ = 5338880.

The previous prime is 20020901. The next prime is 20020937. The reversal of 20020920 is 2902002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20020920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83301 + ... + 83540.

Almost surely, 2^20020920 is an apocalyptic number.

20020920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020920 is an abundant number, since it is smaller than the sum of its proper divisors (40042200).

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

20020920 is a wasteful number, since it uses less digits than its factorization.

20020920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166855 (or 166851 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 20020920 is about 4474.4742707943. The cubic root of 20020920 is about 271.5363713741.

Adding to 20020920 its reverse (2902002), we get a palindrome (22922922).

The spelling of 20020920 in words is "twenty million, twenty thousand, nine hundred twenty".