20922216 has 48 divisors (see below), whose sum is σ = 60848640. Its totient is φ = 5977440.

The previous prime is 20922199. The next prime is 20922269. The reversal of 20922216 is 61222902.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7720 + ... + 10071.

It is an arithmetic number, because the mean of its divisors is an integer number (1267680).

Almost surely, 2^20922216 is an apocalyptic number.

It is an amenable number.

20922216 is an abundant number, since it is smaller than the sum of its proper divisors (39926424).

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

20922216 is a wasteful number, since it uses less digits than its factorization.

20922216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17814 (or 17803 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 20922216 is about 4574.0808912830. The cubic root of 20922216 is about 275.5513610280.

The spelling of 20922216 in words is "twenty million, nine hundred twenty-two thousand, two hundred sixteen".