19237967401 has 9 divisors (see below), whose sum is σ = 19615291941. Its totient is φ = 18867774432.

The previous prime is 19237967369. The next prime is 19237967407. The reversal of 19237967401 is 10476973291.

The square root of 19237967401 is 138701.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 11004219801 + 8233747600 = 104901^2 + 90740^2 .

It is not a de Polignac number, because 19237967401 - 2⁵ = 19237967369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19237967407) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7349845 + ... + 7352461.

Almost surely, 2^19237967401 is an apocalyptic number.

19237967401 is the 138701-st square number.

19237967401 is the 69351-st centered octagonal number.

It is an amenable number.

19237967401 is a deficient number, since it is larger than the sum of its proper divisors (377324540).

19237967401 is an frugal number, since it uses more digits than its factorization.

19237967401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5340 (or 2670 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 49.

Multiplying 19237967401 by its sum of digits (49), we get a square (942660402649 = 970907²).

The spelling of 19237967401 in words is "nineteen billion, two hundred thirty-seven million, nine hundred sixty-seven thousand, four hundred one".