19100102020 has 24 divisors (see below), whose sum is σ = 40356296064. Its totient is φ = 7593168096.

The previous prime is 19100101981. The next prime is 19100102023. The reversal of 19100102020 is 2020100191.

It is a junction number, because it is equal to n+sod(n) for n = 19100101985 and 19100102003.

It is not an unprimeable number, because it can be changed into a prime (19100102023) 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, 2926204 + ... + 2932723.

It is an arithmetic number, because the mean of its divisors is an integer number (1681512336).

Almost surely, 2^19100102020 is an apocalyptic number.

19100102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19100102020 is an abundant number, since it is smaller than the sum of its proper divisors (21256194044).

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

19100102020 is a wasteful number, since it uses less digits than its factorization.

19100102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5859099 (or 5859097 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

The spelling of 19100102020 in words is "nineteen billion, one hundred million, one hundred two thousand, twenty".