20331954 has 48 divisors (see below), whose sum is σ = 46717632. Its totient is φ = 6377184.

The previous prime is 20331953. The next prime is 20331967. The reversal of 20331954 is 45913302.

It is not an unprimeable number, because it can be changed into a prime (20331953) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27372 + ... + 28104.

It is an arithmetic number, because the mean of its divisors is an integer number (973284).

Almost surely, 2^20331954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20331954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23358816).

20331954 is an abundant number, since it is smaller than the sum of its proper divisors (26385678).

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

20331954 is a wasteful number, since it uses less digits than its factorization.

20331954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 20331954 is about 4509.0968053481. The cubic root of 20331954 is about 272.9352984373.

The spelling of 20331954 in words is "twenty million, three hundred thirty-one thousand, nine hundred fifty-four".