20992460 has 12 divisors (see below), whose sum is σ = 44084208. Its totient is φ = 8396976.

The previous prime is 20992453. The next prime is 20992463. The reversal of 20992460 is 6429902.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20992463) 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, 524792 + ... + 524831.

It is an arithmetic number, because the mean of its divisors is an integer number (3673684).

Almost surely, 2^20992460 is an apocalyptic number.

20992460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20992460 is an abundant number, since it is smaller than the sum of its proper divisors (23091748).

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

20992460 is a wasteful number, since it uses less digits than its factorization.

20992460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049632 (or 1049630 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 20992460 is about 4581.7529396509. The cubic root of 20992460 is about 275.8593941802.

The spelling of 20992460 in words is "twenty million, nine hundred ninety-two thousand, four hundred sixty".