19990970046 has 16 divisors (see below), whose sum is σ = 44424378000. Its totient is φ = 6663656664.

The previous prime is 19990970017. The next prime is 19990970047. The reversal of 19990970046 is 64007909991.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 370203149 = 19990970046 / (1 + 9 + 9 + 9 + 0 + 9 + 7 + 0 + 0 + 4 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 19990969974 and 19990970001.

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, 185101521 + ... + 185101628.

It is an arithmetic number, because the mean of its divisors is an integer number (2776523625).

Almost surely, 2^19990970046 is an apocalyptic number.

19990970046 is an abundant number, since it is smaller than the sum of its proper divisors (24433407954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19990970046 is a wasteful number, since it uses less digits than its factorization.

19990970046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370203160 (or 370203154 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The spelling of 19990970046 in words is "nineteen billion, nine hundred ninety million, nine hundred seventy thousand, forty-six".