19674247690 has 16 divisors (see below), whose sum is σ = 35861921280. Its totient is φ = 7770082320.

The previous prime is 19674247687. The next prime is 19674247693. The reversal of 19674247690 is 9674247691.

It is an interprime number because it is at equal distance from previous prime (19674247687) and next prime (19674247693).

It is a super-2 number, since 2×19674247690² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19674247693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12451266 + ... + 12452845.

It is an arithmetic number, because the mean of its divisors is an integer number (2241370080).

Almost surely, 2^19674247690 is an apocalyptic number.

19674247690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19674247690 is a deficient number, since it is larger than the sum of its proper divisors (16187673590).

19674247690 is a wasteful number, since it uses less digits than its factorization.

19674247690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24904197.

The product of its (nonzero) digits is 4572288, while the sum is 55.

Subtracting from 19674247690 its reverse (9674247691), we obtain a palindrome (9999999999).

The spelling of 19674247690 in words is "nineteen billion, six hundred seventy-four million, two hundred forty-seven thousand, six hundred ninety".