20620424 has 16 divisors (see below), whose sum is σ = 42178320. Its totient is φ = 9372880.

The previous prime is 20620423. The next prime is 20620427. The reversal of 20620424 is 42402602.

It is a junction number, because it is equal to n+sod(n) for n = 20620396 and 20620405.

It is not an unprimeable number, because it can be changed into a prime (20620423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117074 + ... + 117249.

It is an arithmetic number, because the mean of its divisors is an integer number (2636145).

Almost surely, 2^20620424 is an apocalyptic number.

It is an amenable number.

20620424 is an abundant number, since it is smaller than the sum of its proper divisors (21557896).

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

20620424 is a wasteful number, since it uses less digits than its factorization.

20620424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234340 (or 234336 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20620424 is about 4540.9717021801. The cubic root of 20620424 is about 274.2200445257.

The spelling of 20620424 in words is "twenty million, six hundred twenty thousand, four hundred twenty-four".