20942912 has 28 divisors (see below), whose sum is σ = 44005500. Its totient is φ = 9854976.

The previous prime is 20942899. The next prime is 20942917. The reversal of 20942912 is 21924902.

It can be written as a sum of positive squares in 2 ways, for example, as 16516096 + 4426816 = 4064^2 + 2104^2 .

It is not an unprimeable number, because it can be changed into a prime (20942917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8537 + ... + 10712.

It is an arithmetic number, because the mean of its divisors is an integer number (1571625).

Almost surely, 2^20942912 is an apocalyptic number.

It is an amenable number.

20942912 is an abundant number, since it is smaller than the sum of its proper divisors (23062588).

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

20942912 is a wasteful number, since it uses less digits than its factorization.

20942912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19278 (or 19268 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 20942912 is about 4576.3426445143. The cubic root of 20942912 is about 275.6421884307.

The spelling of 20942912 in words is "twenty million, nine hundred forty-two thousand, nine hundred twelve".