19924969 has 16 divisors (see below), whose sum is σ = 22239360. Its totient is φ = 17754880.

The previous prime is 19924967. The next prime is 19924973. The reversal of 19924969 is 96942991.

It is a cyclic number.

It is not a de Polignac number, because 19924969 - 2¹ = 19924967 is a prime.

It is a super-2 number, since 2×19924969² = 794008779301922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19924967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51027 + ... + 51415.

It is an arithmetic number, because the mean of its divisors is an integer number (1389960).

Almost surely, 2^19924969 is an apocalyptic number.

It is an amenable number.

19924969 is a deficient number, since it is larger than the sum of its proper divisors (2314391).

19924969 is a wasteful number, since it uses less digits than its factorization.

19924969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560.

The product of its digits is 314928, while the sum is 49.

The square root of 19924969 is about 4463.7393517095. The cubic root of 19924969 is about 271.1018938472.

The spelling of 19924969 in words is "nineteen million, nine hundred twenty-four thousand, nine hundred sixty-nine".