20447850 has 24 divisors (see below), whose sum is σ = 50711040. Its totient is φ = 5452720.

The previous prime is 20447849. The next prime is 20447899. The reversal of 20447850 is 5874402.

It is a super-2 number, since 2×20447850² = 836229139245000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68010 + ... + 68309.

It is an arithmetic number, because the mean of its divisors is an integer number (2112960).

Almost surely, 2^20447850 is an apocalyptic number.

20447850 is an abundant number, since it is smaller than the sum of its proper divisors (30263190).

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

20447850 is a wasteful number, since it uses less digits than its factorization.

20447850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136334 (or 136329 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 20447850 is about 4521.9298977317. The cubic root of 20447850 is about 273.4529105328.

The spelling of 20447850 in words is "twenty million, four hundred forty-seven thousand, eight hundred fifty".