19940464 has 20 divisors (see below), whose sum is σ = 38756200. Its totient is φ = 9938880.

The previous prime is 19940449. The next prime is 19940477. The reversal of 19940464 is 46404991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3799 + ... + 7369.

It is an arithmetic number, because the mean of its divisors is an integer number (1937810).

Almost surely, 2^19940464 is an apocalyptic number.

It is an amenable number.

19940464 is a deficient number, since it is larger than the sum of its proper divisors (18815736).

19940464 is a wasteful number, since it uses less digits than its factorization.

19940464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3928 (or 3922 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 19940464 is about 4465.4746668187. The cubic root of 19940464 is about 271.1721513449.

The spelling of 19940464 in words is "nineteen million, nine hundred forty thousand, four hundred sixty-four".