20608722 has 32 divisors (see below), whose sum is σ = 45975360. Its totient is φ = 6842880.

The previous prime is 20608681. The next prime is 20608723. The reversal of 20608722 is 22780602.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20608723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17298 + ... + 18450.

It is an arithmetic number, because the mean of its divisors is an integer number (1436730).

Almost surely, 2^20608722 is an apocalyptic number.

20608722 is an abundant number, since it is smaller than the sum of its proper divisors (25366638).

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

20608722 is a wasteful number, since it uses less digits than its factorization.

20608722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495 (or 1489 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20608722 is about 4539.6830285825. The cubic root of 20608722 is about 274.1681618200.

Adding to 20608722 its product of nonzero digits (2688), we get a triangular number (20611410 = T₆₄₂₀).

The spelling of 20608722 in words is "twenty million, six hundred eight thousand, seven hundred twenty-two".