20536634 has 8 divisors (see below), whose sum is σ = 30888660. Its totient is φ = 10240416.

The previous prime is 20536627. The next prime is 20536643. The reversal of 20536634 is 43663502.

It can be written as a sum of positive squares in 2 ways, for example, as 20475625 + 61009 = 4525^2 + 247^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20536597 and 20536606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13019 + ... + 14510.

Almost surely, 2^20536634 is an apocalyptic number.

20536634 is a deficient number, since it is larger than the sum of its proper divisors (10352026).

20536634 is a wasteful number, since it uses less digits than its factorization.

20536634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27904.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 20536634 is about 4531.7363118346. The cubic root of 20536634 is about 273.8481140911.

The spelling of 20536634 in words is "twenty million, five hundred thirty-six thousand, six hundred thirty-four".