19973264 has 10 divisors (see below), whose sum is σ = 38698230. Its totient is φ = 9986624.

The previous prime is 19973263. The next prime is 19973267. The reversal of 19973264 is 46237991.

It can be written as a sum of positive squares in only one way, i.e., 16875664 + 3097600 = 4108^2 + 1760^2 .

It is not an unprimeable number, because it can be changed into a prime (19973263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624149 + ... + 624180.

It is an arithmetic number, because the mean of its divisors is an integer number (3869823).

Almost surely, 2^19973264 is an apocalyptic number.

It is an amenable number.

19973264 is a deficient number, since it is larger than the sum of its proper divisors (18724966).

19973264 is a wasteful number, since it uses less digits than its factorization.

19973264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248337 (or 1248331 counting only the distinct ones).

The product of its digits is 81648, while the sum is 41.

The square root of 19973264 is about 4469.1457796765. The cubic root of 19973264 is about 271.3207532731.

The spelling of 19973264 in words is "nineteen million, nine hundred seventy-three thousand, two hundred sixty-four".