19972110 has 32 divisors (see below), whose sum is σ = 50753952. Its totient is φ = 5012480.

The previous prime is 19972079. The next prime is 19972111. The reversal of 19972110 is 1127991.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19972111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19071 + ... + 20090.

It is an arithmetic number, because the mean of its divisors is an integer number (1586061).

Almost surely, 2^19972110 is an apocalyptic number.

19972110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19972110 is an abundant number, since it is smaller than the sum of its proper divisors (30781842).

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

19972110 is a wasteful number, since it uses less digits than its factorization.

19972110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39188.

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 19972110 is about 4469.0166703650. The cubic root of 19972110 is about 271.3155277847.

The spelling of 19972110 in words is "nineteen million, nine hundred seventy-two thousand, one hundred ten".