20490712 has 32 divisors (see below), whose sum is σ = 44381520. Its totient is φ = 8765440.

The previous prime is 20490709. The next prime is 20490713. The reversal of 20490712 is 21709402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20490713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5353 + ... + 8344.

Almost surely, 2^20490712 is an apocalyptic number.

20490712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20490712 is an abundant number, since it is smaller than the sum of its proper divisors (23890808).

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

20490712 is a wasteful number, since it uses less digits than its factorization.

20490712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13731 (or 13727 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 20490712 is about 4526.6667648503. Note that the first 3 decimals coincide. The cubic root of 20490712 is about 273.6438443580.

The spelling of 20490712 in words is "twenty million, four hundred ninety thousand, seven hundred twelve".