20875420 has 48 divisors (see below), whose sum is σ = 45372096. Its totient is φ = 8064000.

The previous prime is 20875409. The next prime is 20875427. The reversal of 20875420 is 2457802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20875427) 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, 86500 + ... + 86740.

It is an arithmetic number, because the mean of its divisors is an integer number (945252).

Almost surely, 2^20875420 is an apocalyptic number.

20875420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20875420 is an abundant number, since it is smaller than the sum of its proper divisors (24496676).

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

20875420 is a wasteful number, since it uses less digits than its factorization.

20875420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 20875420 is about 4568.9626831481. The cubic root of 20875420 is about 275.3457689249.

The spelling of 20875420 in words is "twenty million, eight hundred seventy-five thousand, four hundred twenty".