19790299684 has 27 divisors (see below), whose sum is σ = 35802036081. Its totient is φ = 9571731120.

The previous prime is 19790299621. The next prime is 19790299687. The reversal of 19790299684 is 48699209791.

The square root of 19790299684 is 140678.

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

It can be written as a sum of positive squares in only one way, i.e., 845530084 + 18944769600 = 29078^2 + 137640^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19790299687) 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, 8720902 + ... + 8723170.

Almost surely, 2^19790299684 is an apocalyptic number.

19790299684 is the 140678-th square number.

It is an amenable number.

19790299684 is a deficient number, since it is larger than the sum of its proper divisors (16011736397).

19790299684 is an frugal number, since it uses more digits than its factorization.

19790299684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4604 (or 2302 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 64.

Multiplying 19790299684 by its sum of digits (64), we get a square (1266579179776 = 1125424²).

The spelling of 19790299684 in words is "nineteen billion, seven hundred ninety million, two hundred ninety-nine thousand, six hundred eighty-four".