20914320 has 160 divisors (see below), whose sum is σ = 75709440. Its totient is φ = 4677120.

The previous prime is 20914319. The next prime is 20914321. The reversal of 20914320 is 2341902.

It is an interprime number because it is at equal distance from previous prime (20914319) and next prime (20914321).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20914321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99015 + ... + 99225.

It is an arithmetic number, because the mean of its divisors is an integer number (473184).

Almost surely, 2^20914320 is an apocalyptic number.

20914320 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 20914320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37854720).

20914320 is an abundant number, since it is smaller than the sum of its proper divisors (54795120).

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

20914320 is a wasteful number, since it uses less digits than its factorization.

20914320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 20914320 is about 4573.2176856126. The cubic root of 20914320 is about 275.5166924997.

The spelling of 20914320 in words is "twenty million, nine hundred fourteen thousand, three hundred twenty".