19420453 has 8 divisors (see below), whose sum is σ = 20957048. Its totient is φ = 17889984.

The previous prime is 19420439. The next prime is 19420501. The reversal of 19420453 is 35402491.

It can be written as a sum of positive squares in 4 ways, for example, as 209764 + 19210689 = 458^2 + 4383^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19420453 - 2⁹ = 19419941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19420253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6751 + ... + 9187.

It is an arithmetic number, because the mean of its divisors is an integer number (2619631).

Almost surely, 2^19420453 is an apocalyptic number.

19420453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19420453 is a deficient number, since it is larger than the sum of its proper divisors (1536595).

19420453 is a wasteful number, since it uses less digits than its factorization.

19420453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3063.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 19420453 is about 4406.8643046956. The cubic root of 19420453 is about 268.7941331524.

The spelling of 19420453 in words is "nineteen million, four hundred twenty thousand, four hundred fifty-three".