20193820 has 24 divisors (see below), whose sum is σ = 43007328. Its totient is φ = 7963200.

The previous prime is 20193799. The next prime is 20193863. The reversal of 20193820 is 2839102.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5691 + ... + 8530.

It is an arithmetic number, because the mean of its divisors is an integer number (1791972).

Almost surely, 2^20193820 is an apocalyptic number.

20193820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20193820 is an abundant number, since it is smaller than the sum of its proper divisors (22813508).

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

20193820 is a wasteful number, since it uses less digits than its factorization.

20193820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14301 (or 14299 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 20193820 is about 4493.7534422796. The cubic root of 20193820 is about 272.3157916730.

The spelling of 20193820 in words is "twenty million, one hundred ninety-three thousand, eight hundred twenty".