19979952 has 20 divisors (see below), whose sum is σ = 51615000. Its totient is φ = 6659968.

The previous prime is 19979941. The next prime is 19979959. The reversal of 19979952 is 25997991.

It is a junction number, because it is equal to n+sod(n) for n = 19979895 and 19979904.

It is not an unprimeable number, because it can be changed into a prime (19979959) 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, 208077 + ... + 208172.

It is an arithmetic number, because the mean of its divisors is an integer number (2580750).

Almost surely, 2^19979952 is an apocalyptic number.

19979952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19979952 is an abundant number, since it is smaller than the sum of its proper divisors (31635048).

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

19979952 is a wasteful number, since it uses less digits than its factorization.

19979952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416260 (or 416254 counting only the distinct ones).

The product of its digits is 459270, while the sum is 51.

The square root of 19979952 is about 4469.8939584737. The cubic root of 19979952 is about 271.3510335968.

The spelling of 19979952 in words is "nineteen million, nine hundred seventy-nine thousand, nine hundred fifty-two".