20203872 has 48 divisors (see below), whose sum is σ = 57118320. Its totient is φ = 6216192.

The previous prime is 20203861. The next prime is 20203877. The reversal of 20203872 is 27830202.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203877) 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, 6847 + ... + 9342.

It is an arithmetic number, because the mean of its divisors is an integer number (1189965).

Almost surely, 2^20203872 is an apocalyptic number.

It is an amenable number.

20203872 is an abundant number, since it is smaller than the sum of its proper divisors (36914448).

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

20203872 is a wasteful number, since it uses less digits than its factorization.

20203872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16215 (or 16207 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20203872 is about 4494.8717445551. The cubic root of 20203872 is about 272.3609682712.

The spelling of 20203872 in words is "twenty million, two hundred three thousand, eight hundred seventy-two".