20203830972 has 120 divisors (see below), whose sum is σ = 57729392336. Its totient is φ = 6123693312.

The previous prime is 20203830971. The next prime is 20203830979. The reversal of 20203830972 is 27903830202.

20203830972 is a `hidden beast` number, since 202 + 0 + 383 + 0 + 9 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203830971) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 246408 + ... + 318000.

Almost surely, 2^20203830972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20203830972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28864696168).

20203830972 is an abundant number, since it is smaller than the sum of its proper divisors (37525561364).

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

20203830972 is a wasteful number, since it uses less digits than its factorization.

20203830972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71689 (or 71678 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 20203830972 in words is "twenty billion, two hundred three million, eight hundred thirty thousand, nine hundred seventy-two".