20890360 has 16 divisors (see below), whose sum is σ = 47003400. Its totient is φ = 8356128.

The previous prime is 20890351. The next prime is 20890369. The reversal of 20890360 is 6309802.

It is an interprime number because it is at equal distance from previous prime (20890351) and next prime (20890369).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20890369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261090 + ... + 261169.

Almost surely, 2^20890360 is an apocalyptic number.

20890360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20890360 is an abundant number, since it is smaller than the sum of its proper divisors (26113040).

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

20890360 is a wasteful number, since it uses less digits than its factorization.

20890360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522270 (or 522266 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20890360 is about 4570.5973351412. The cubic root of 20890360 is about 275.4114392177.

The spelling of 20890360 in words is "twenty million, eight hundred ninety thousand, three hundred sixty".