19973256 has 32 divisors (see below), whose sum is σ = 52562400. Its totient is φ = 6307200.

The previous prime is 19973251. The next prime is 19973263. The reversal of 19973256 is 65237991.

It is not an unprimeable number, because it can be changed into a prime (19973251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21445 + ... + 22356.

It is an arithmetic number, because the mean of its divisors is an integer number (1642575).

Almost surely, 2^19973256 is an apocalyptic number.

It is an amenable number.

19973256 is an abundant number, since it is smaller than the sum of its proper divisors (32589144).

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

19973256 is a wasteful number, since it uses less digits than its factorization.

19973256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43829 (or 43825 counting only the distinct ones).

The product of its digits is 102060, while the sum is 42.

The square root of 19973256 is about 4469.1448846508. The cubic root of 19973256 is about 271.3207170486.

It can be divided in two parts, 1997 and 3256, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 19973256 in words is "nineteen million, nine hundred seventy-three thousand, two hundred fifty-six".