19697364 has 48 divisors (see below), whose sum is σ = 51331840. Its totient is φ = 6531840.

The previous prime is 19697347. The next prime is 19697389. The reversal of 19697364 is 46379691.

19697364 = 123² + 124² + ... + 393².

It is a super-2 number, since 2×19697364² = 775972297096992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28932 + ... + 29604.

Almost surely, 2^19697364 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19697364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25665920).

19697364 is an abundant number, since it is smaller than the sum of its proper divisors (31634476).

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

19697364 is a wasteful number, since it uses less digits than its factorization.

19697364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957 (or 949 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 19697364 is about 4438.1712450062. The cubic root of 19697364 is about 270.0656630420.

The spelling of 19697364 in words is "nineteen million, six hundred ninety-seven thousand, three hundred sixty-four".