20670534 has 24 divisors (see below), whose sum is σ = 45402552. Its totient is φ = 6795360.

The previous prime is 20670523. The next prime is 20670547. The reversal of 20670534 is 43507602.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20670498 and 20670507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6552 + ... + 9179.

It is an arithmetic number, because the mean of its divisors is an integer number (1891773).

Almost surely, 2^20670534 is an apocalyptic number.

20670534 is an abundant number, since it is smaller than the sum of its proper divisors (24732018).

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

20670534 is a wasteful number, since it uses less digits than its factorization.

20670534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15812 (or 15809 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20670534 is about 4546.4858957221. The cubic root of 20670534 is about 274.4419935759.

The spelling of 20670534 in words is "twenty million, six hundred seventy thousand, five hundred thirty-four".