19371399772 has 6 divisors (see below), whose sum is σ = 33899949608. Its totient is φ = 9685699884.

The previous prime is 19371399763. The next prime is 19371399781. The reversal of 19371399772 is 27799317391.

It is an interprime number because it is at equal distance from previous prime (19371399763) and next prime (19371399781).

It is a super-2 number, since 2×19371399772² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2421424968 + ... + 2421424975.

Almost surely, 2^19371399772 is an apocalyptic number.

It is an amenable number.

19371399772 is a deficient number, since it is larger than the sum of its proper divisors (14528549836).

19371399772 is a wasteful number, since it uses less digits than its factorization.

19371399772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4842849947 (or 4842849945 counting only the distinct ones).

The product of its digits is 4500846, while the sum is 58.

The spelling of 19371399772 in words is "nineteen billion, three hundred seventy-one million, three hundred ninety-nine thousand, seven hundred seventy-two".