19046999664 has 800 divisors, whose sum is σ = 73010184192. Its totient is φ = 4650048000.

The previous prime is 19046999651. The next prime is 19046999669. The reversal of 19046999664 is 46699964091.

It is a super-2 number, since 2×19046999664² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19046999669) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 145396879 + ... + 145397009.

Almost surely, 2^19046999664 is an apocalyptic number.

19046999664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19046999664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36505092096).

19046999664 is an abundant number, since it is smaller than the sum of its proper divisors (53963184528).

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

19046999664 is a wasteful number, since it uses less digits than its factorization.

19046999664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 63.

The spelling of 19046999664 in words is "nineteen billion, forty-six million, nine hundred ninety-nine thousand, six hundred sixty-four".