20470650 has 24 divisors (see below), whose sum is σ = 50767584. Its totient is φ = 5458800.

The previous prime is 20470627. The next prime is 20470651. The reversal of 20470650 is 5607402.

It is a happy number.

It is a super-2 number, since 2×20470650² = 838095022845000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20470650.

It is not an unprimeable number, because it can be changed into a prime (20470651) 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, 68086 + ... + 68385.

It is an arithmetic number, because the mean of its divisors is an integer number (2115316).

Almost surely, 2^20470650 is an apocalyptic number.

20470650 is an abundant number, since it is smaller than the sum of its proper divisors (30296934).

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

20470650 is a wasteful number, since it uses less digits than its factorization.

20470650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136486 (or 136481 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20470650 is about 4524.4502428472. The cubic root of 20470650 is about 273.5545089974.

The spelling of 20470650 in words is "twenty million, four hundred seventy thousand, six hundred fifty".