20942922 has 96 divisors (see below), whose sum is σ = 56843136. Its totient is φ = 5005440.

The previous prime is 20942917. The next prime is 20942951. The reversal of 20942922 is 22924902.

It is a self number, because there is not a number n which added to its sum of digits gives 20942922.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65908 + ... + 66224.

It is an arithmetic number, because the mean of its divisors is an integer number (592116).

Almost surely, 2^20942922 is an apocalyptic number.

20942922 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20942922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28421568).

20942922 is an abundant number, since it is smaller than the sum of its proper divisors (35900214).

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

20942922 is a wasteful number, since it uses less digits than its factorization.

20942922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 20942922 is about 4576.3437370897. The cubic root of 20942922 is about 275.6422323027.

The spelling of 20942922 in words is "twenty million, nine hundred forty-two thousand, nine hundred twenty-two".