20670930 has 64 divisors (see below), whose sum is σ = 63002880. Its totient is φ = 4724352.

The previous prime is 20670911. The next prime is 20670941. The reversal of 20670930 is 3907602.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20670894 and 20670903.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3579 + ... + 7358.

It is an arithmetic number, because the mean of its divisors is an integer number (984420).

Almost surely, 2^20670930 is an apocalyptic number.

20670930 is an abundant number, since it is smaller than the sum of its proper divisors (42331950).

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

20670930 is a wasteful number, since it uses less digits than its factorization.

20670930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10960 (or 10954 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 20670930 is about 4546.5294456321. The cubic root of 20670930 is about 274.4437461243.

It can be divided in two parts, 20670 and 930, that multiplied together give a triangular number (19223100 = T₆₂₀₀).

The spelling of 20670930 in words is "twenty million, six hundred seventy thousand, nine hundred thirty".