19922490 has 128 divisors (see below), whose sum is σ = 61931520. Its totient is φ = 4463424.

The previous prime is 19922479. The next prime is 19922509. The reversal of 19922490 is 9422991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 156807 + ... + 156933.

It is an arithmetic number, because the mean of its divisors is an integer number (483840).

Almost surely, 2^19922490 is an apocalyptic number.

19922490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19922490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30965760).

19922490 is an abundant number, since it is smaller than the sum of its proper divisors (42009030).

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

19922490 is a wasteful number, since it uses less digits than its factorization.

19922490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 19922490 is about 4463.4616610877. The cubic root of 19922490 is about 271.0906501748.

The spelling of 19922490 in words is "nineteen million, nine hundred twenty-two thousand, four hundred ninety".