19772423 has 12 divisors (see below), whose sum is σ = 21912072. Its totient is φ = 17693520.

The previous prime is 19772359. The next prime is 19772429. The reversal of 19772423 is 32427791.

It is not a de Polignac number, because 19772423 - 2⁶ = 19772359 is a prime.

It is a super-2 number, since 2×19772423² = 781897422581858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19772429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125861 + ... + 126017.

It is an arithmetic number, because the mean of its divisors is an integer number (1826006).

Almost surely, 2^19772423 is an apocalyptic number.

19772423 is a deficient number, since it is larger than the sum of its proper divisors (2139649).

19772423 is a wasteful number, since it uses less digits than its factorization.

19772423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 275 counting only the distinct ones).

The product of its digits is 21168, while the sum is 35.

The square root of 19772423 is about 4446.6192776086. The cubic root of 19772423 is about 270.4082666657.

The spelling of 19772423 in words is "nineteen million, seven hundred seventy-two thousand, four hundred twenty-three".