19420559 has 6 divisors (see below), whose sum is σ = 19731816. Its totient is φ = 19110420.

The previous prime is 19420537. The next prime is 19420561. The reversal of 19420559 is 95502491.

It is not a de Polignac number, because 19420559 - 2²⁴ = 2643343 is a prime.

It is a super-2 number, since 2×19420559² = 754316223744962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19420759) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36872 + ... + 37394.

It is an arithmetic number, because the mean of its divisors is an integer number (3288636).

Almost surely, 2^19420559 is an apocalyptic number.

19420559 is a deficient number, since it is larger than the sum of its proper divisors (311257).

19420559 is an frugal number, since it uses more digits than its factorization.

19420559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 19420559 is about 4406.8763313712. The cubic root of 19420559 is about 268.7946221923.

The spelling of 19420559 in words is "nineteen million, four hundred twenty thousand, five hundred fifty-nine".