20646270 has 24 divisors (see below), whose sum is σ = 53680536. Its totient is φ = 5505648.

The previous prime is 20646257. The next prime is 20646271. The reversal of 20646270 is 7264602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20646271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114612 + ... + 114791.

It is an arithmetic number, because the mean of its divisors is an integer number (2236689).

Almost surely, 2^20646270 is an apocalyptic number.

20646270 is an abundant number, since it is smaller than the sum of its proper divisors (33034266).

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

20646270 is a wasteful number, since it uses less digits than its factorization.

20646270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229416 (or 229413 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20646270 is about 4543.8166776401. The cubic root of 20646270 is about 274.3345674236.

The spelling of 20646270 in words is "twenty million, six hundred forty-six thousand, two hundred seventy".