20426604 has 24 divisors (see below), whose sum is σ = 51995328. Its totient is φ = 6189840.

The previous prime is 20426603. The next prime is 20426611. The reversal of 20426604 is 40662402.

It is not an unprimeable number, because it can be changed into a prime (20426603) 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, 77242 + ... + 77505.

It is an arithmetic number, because the mean of its divisors is an integer number (2166472).

Almost surely, 2^20426604 is an apocalyptic number.

It is an amenable number.

20426604 is an abundant number, since it is smaller than the sum of its proper divisors (31568724).

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

20426604 is a wasteful number, since it uses less digits than its factorization.

20426604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154765 (or 154763 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20426604 is about 4519.5800689887. The cubic root of 20426604 is about 273.3581688055.

It can be divided in two parts, 2042 and 6604, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 20426604 in words is "twenty million, four hundred twenty-six thousand, six hundred four".