19722190 has 16 divisors (see below), whose sum is σ = 37368720. Its totient is φ = 7473600.

The previous prime is 19722163. The next prime is 19722203. The reversal of 19722190 is 9122791.

It is a super-2 number, since 2×19722190² = 777929556792200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51711 + ... + 52090.

It is an arithmetic number, because the mean of its divisors is an integer number (2335545).

Almost surely, 2^19722190 is an apocalyptic number.

19722190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19722190 is a deficient number, since it is larger than the sum of its proper divisors (17646530).

19722190 is a wasteful number, since it uses less digits than its factorization.

19722190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103827.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 19722190 is about 4440.9672369879. The cubic root of 19722190 is about 270.1790764466.

The spelling of 19722190 in words is "nineteen million, seven hundred twenty-two thousand, one hundred ninety".