20993122 has 8 divisors (see below), whose sum is σ = 31591872. Its totient is φ = 10462500.

The previous prime is 20993111. The next prime is 20993123. The reversal of 20993122 is 22139902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20993122² = 881422342613768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20993123) 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, 16254 + ... + 17497.

It is an arithmetic number, because the mean of its divisors is an integer number (3948984).

Almost surely, 2^20993122 is an apocalyptic number.

20993122 is a deficient number, since it is larger than the sum of its proper divisors (10598750).

20993122 is a wasteful number, since it uses less digits than its factorization.

20993122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34064.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 20993122 is about 4581.8251821736. The cubic root of 20993122 is about 275.8622939039.

It can be divided in two parts, 20993 and 122, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 20993122 in words is "twenty million, nine hundred ninety-three thousand, one hundred twenty-two".