19122420 has 48 divisors (see below), whose sum is σ = 54690048. Its totient is φ = 4990080.

The previous prime is 19122413. The next prime is 19122437. The reversal of 19122420 is 2422191.

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, 571 + ... + 6210.

It is an arithmetic number, because the mean of its divisors is an integer number (1139376).

Almost surely, 2^19122420 is an apocalyptic number.

19122420 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 19122420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27345024).

19122420 is an abundant number, since it is smaller than the sum of its proper divisors (35567628).

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

19122420 is a wasteful number, since it uses less digits than its factorization.

19122420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840 (or 6838 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 19122420 is about 4372.9189336186. The cubic root of 19122420 is about 267.4120361777.

The spelling of 19122420 in words is "nineteen million, one hundred twenty-two thousand, four hundred twenty".