20722508 has 12 divisors (see below), whose sum is σ = 37434432. Its totient is φ = 10026960.

The previous prime is 20722453. The next prime is 20722519. The reversal of 20722508 is 80522702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83435 + ... + 83682.

It is an arithmetic number, because the mean of its divisors is an integer number (3119536).

Almost surely, 2^20722508 is an apocalyptic number.

It is an amenable number.

20722508 is a deficient number, since it is larger than the sum of its proper divisors (16711924).

20722508 is a wasteful number, since it uses less digits than its factorization.

20722508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167152 (or 167150 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 20722508 is about 4552.1981503445. The cubic root of 20722508 is about 274.6718200822.

The spelling of 20722508 in words is "twenty million, seven hundred twenty-two thousand, five hundred eight".