20459634 has 16 divisors (see below), whose sum is σ = 44067072. Its totient is φ = 6295248.

The previous prime is 20459629. The next prime is 20459651. The reversal of 20459634 is 43695402.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20459595 and 20459604.

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, 131074 + ... + 131229.

It is an arithmetic number, because the mean of its divisors is an integer number (2754192).

Almost surely, 2^20459634 is an apocalyptic number.

20459634 is an abundant number, since it is smaller than the sum of its proper divisors (23607438).

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

20459634 is a wasteful number, since it uses less digits than its factorization.

20459634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262321.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 20459634 is about 4523.2326935500. The cubic root of 20459634 is about 273.5054303215.

The spelling of 20459634 in words is "twenty million, four hundred fifty-nine thousand, six hundred thirty-four".