19092020 has 48 divisors (see below), whose sum is σ = 42810768. Its totient is φ = 7127040.

The previous prime is 19091993. The next prime is 19092041. The reversal of 19092020 is 2029091.

It can be written as a sum of positive squares in 8 ways, for example, as 47524 + 19044496 = 218^2 + 4364^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79100 + ... + 79340.

It is an arithmetic number, because the mean of its divisors is an integer number (891891).

Almost surely, 2^19092020 is an apocalyptic number.

19092020 is a gapful number since it is divisible by the number (10) 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 19092020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21405384).

19092020 is an abundant number, since it is smaller than the sum of its proper divisors (23718748).

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

19092020 is a wasteful number, since it uses less digits than its factorization.

19092020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 19092020 is about 4369.4416119225. The cubic root of 19092020 is about 267.2702543044.

The spelling of 19092020 in words is "nineteen million, ninety-two thousand, twenty".