20889360 has 160 divisors (see below), whose sum is σ = 75888000. Its totient is φ = 5266944.

The previous prime is 20889347. The next prime is 20889373. The reversal of 20889360 is 6398802.

It is an interprime number because it is at equal distance from previous prime (20889347) and next prime (20889373).

It is a super-2 number, since 2×20889360² = 872730722419200, which contains 22 as substring.

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

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, 40786 + ... + 41294.

It is an arithmetic number, because the mean of its divisors is an integer number (474300).

Almost surely, 2^20889360 is an apocalyptic number.

20889360 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 20889360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37944000).

20889360 is an abundant number, since it is smaller than the sum of its proper divisors (54998640).

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

20889360 is a wasteful number, since it uses less digits than its factorization.

20889360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 20889360 is about 4570.4879389404. The cubic root of 20889360 is about 275.4070445937.

The spelling of 20889360 in words is "twenty million, eight hundred eighty-nine thousand, three hundred sixty".