19162020 has 48 divisors (see below), whose sum is σ = 54573120. Its totient is φ = 5022336.

The previous prime is 19161997. The next prime is 19162021. The reversal of 19162020 is 2026191.

It is not an unprimeable number, because it can be changed into a prime (19162021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 834 + ... + 6246.

It is an arithmetic number, because the mean of its divisors is an integer number (1136940).

Almost surely, 2^19162020 is an apocalyptic number.

19162020 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 19162020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27286560).

19162020 is an abundant number, since it is smaller than the sum of its proper divisors (35411100).

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

19162020 is a wasteful number, since it uses less digits than its factorization.

19162020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5484 (or 5482 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 19162020 is about 4377.4444599561. Note that the first 4 decimals coincide. The cubic root of 19162020 is about 267.5965005430.

The spelling of 19162020 in words is "nineteen million, one hundred sixty-two thousand, twenty".