19020621312 has 640 divisors, whose sum is σ = 71275438080. Its totient is φ = 4864942080.

The previous prime is 19020621311. The next prime is 19020621341. The reversal of 19020621312 is 21312602091.

19020621312 is a `hidden beast` number, since 1 + 9 + 0 + 2 + 0 + 621 + 31 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19020621311) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 113895853 + ... + 113896019.

It is an arithmetic number, because the mean of its divisors is an integer number (111367872).

Almost surely, 2^19020621312 is an apocalyptic number.

19020621312 is a gapful number since it is divisible by the number (12) 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 19020621312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35637719040).

19020621312 is an abundant number, since it is smaller than the sum of its proper divisors (52254816768).

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

19020621312 is a wasteful number, since it uses less digits than its factorization.

19020621312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The spelling of 19020621312 in words is "nineteen billion, twenty million, six hundred twenty-one thousand, three hundred twelve".