19420836 has 24 divisors (see below), whose sum is σ = 46878720. Its totient is φ = 6250272.

The previous prime is 19420829. The next prime is 19420837. The reversal of 19420836 is 63802491.

It is a junction number, because it is equal to n+sod(n) for n = 19420797 and 19420806.

It is not an unprimeable number, because it can be changed into a prime (19420837) 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, 27556 + ... + 28251.

It is an arithmetic number, because the mean of its divisors is an integer number (1953280).

Almost surely, 2^19420836 is an apocalyptic number.

It is an amenable number.

19420836 is an abundant number, since it is smaller than the sum of its proper divisors (27457884).

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

19420836 is a wasteful number, since it uses less digits than its factorization.

19420836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55843 (or 55841 counting only the distinct ones).

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

The square root of 19420836 is about 4406.9077594159. The cubic root of 19420836 is about 268.7959001465.

The spelling of 19420836 in words is "nineteen million, four hundred twenty thousand, eight hundred thirty-six".