20968500 has 96 divisors (see below), whose sum is σ = 69818112. Its totient is φ = 4790400.

The previous prime is 20968499. The next prime is 20968511. The reversal of 20968500 is 586902.

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 31 ways as a sum of consecutive naturals, for example, 9502 + ... + 11498.

It is an arithmetic number, because the mean of its divisors is an integer number (727272).

Almost surely, 2^20968500 is an apocalyptic number.

20968500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20968500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34909056).

20968500 is an abundant number, since it is smaller than the sum of its proper divisors (48849612).

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

20968500 is a wasteful number, since it uses less digits than its factorization.

20968500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026 (or 2014 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 20968500 is about 4579.1374733677. The cubic root of 20968500 is about 275.7544023987.

The spelling of 20968500 in words is "twenty million, nine hundred sixty-eight thousand, five hundred".