19800454 has 8 divisors (see below), whose sum is σ = 29795328. Its totient is φ = 9868680.

The previous prime is 19800421. The next prime is 19800463. The reversal of 19800454 is 45400891.

It is a happy number.

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

It is a super-2 number, since 2×19800454² = 784115957212232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14982 + ... + 16249.

It is an arithmetic number, because the mean of its divisors is an integer number (3724416).

Almost surely, 2^19800454 is an apocalyptic number.

19800454 is a deficient number, since it is larger than the sum of its proper divisors (9994874).

19800454 is a wasteful number, since it uses less digits than its factorization.

19800454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31550.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 19800454 is about 4449.7701064212. The cubic root of 19800454 is about 270.5359906009.

The spelling of 19800454 in words is "nineteen million, eight hundred thousand, four hundred fifty-four".