19912970 has 48 divisors (see below), whose sum is σ = 45045504. Its totient is φ = 6204000.

The previous prime is 19912961. The next prime is 19912979. The reversal of 19912970 is 7921991.

It is an interprime number because it is at equal distance from previous prime (19912961) and next prime (19912979).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19912979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7295 + ... + 9645.

It is an arithmetic number, because the mean of its divisors is an integer number (938448).

Almost surely, 2^19912970 is an apocalyptic number.

19912970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19912970 is an abundant number, since it is smaller than the sum of its proper divisors (25132534).

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

19912970 is a wasteful number, since it uses less digits than its factorization.

19912970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387 (or 2376 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 19912970 is about 4462.3950968062. The cubic root of 19912970 is about 271.0474628996.

The spelling of 19912970 in words is "nineteen million, nine hundred twelve thousand, nine hundred seventy".