19291820020 has 24 divisors (see below), whose sum is σ = 44195806368. Its totient is φ = 7015207200.

The previous prime is 19291820003. The next prime is 19291820029. The reversal of 19291820020 is 2002819291.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19291820029) 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, 43844826 + ... + 43845265.

It is an arithmetic number, because the mean of its divisors is an integer number (1841491932).

Almost surely, 2^19291820020 is an apocalyptic number.

19291820020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19291820020 is an abundant number, since it is smaller than the sum of its proper divisors (24903986348).

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

19291820020 is a wasteful number, since it uses less digits than its factorization.

19291820020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87690111 (or 87690109 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 19291820020 in words is "nineteen billion, two hundred ninety-one million, eight hundred twenty thousand, twenty".