19420863 has 24 divisors (see below), whose sum is σ = 32532864. Its totient is φ = 10087440.

The previous prime is 19420837. The next prime is 19420867. The reversal of 19420863 is 36802491.

It is not a de Polignac number, because 19420863 - 2¹⁰ = 19419839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19420867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1281 + ... + 6362.

It is an arithmetic number, because the mean of its divisors is an integer number (1355536).

Almost surely, 2^19420863 is an apocalyptic number.

19420863 is a deficient number, since it is larger than the sum of its proper divisors (13112001).

19420863 is a wasteful number, since it uses less digits than its factorization.

19420863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7675 (or 7664 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 19420863 is about 4406.9108227873. The cubic root of 19420863 is about 268.7960247118.

The spelling of 19420863 in words is "nineteen million, four hundred twenty thousand, eight hundred sixty-three".