19990970045 has 8 divisors (see below), whose sum is σ = 23991172920. Its totient is φ = 15991436800.

The previous prime is 19990970017. The next prime is 19990970047. The reversal of 19990970045 is 54007909991.

It can be written as a sum of positive squares in 4 ways, for example, as 336612409 + 19654357636 = 18347^2 + 140194^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19990970045 - 2⁶ = 19990969981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19990970047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99200 + ... + 223209.

It is an arithmetic number, because the mean of its divisors is an integer number (2998896615).

Almost surely, 2^19990970045 is an apocalyptic number.

It is an amenable number.

19990970045 is a deficient number, since it is larger than the sum of its proper divisors (4000202875).

19990970045 is a wasteful number, since it uses less digits than its factorization.

19990970045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334815.

The product of its (nonzero) digits is 918540, while the sum is 53.

The spelling of 19990970045 in words is "nineteen billion, nine hundred ninety million, nine hundred seventy thousand, forty-five".