20711616 has 28 divisors (see below), whose sum is σ = 54799992. Its totient is φ = 6903808.

The previous prime is 20711611. The next prime is 20711617. The reversal of 20711616 is 61611702.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20711611) 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, 53745 + ... + 54128.

Almost surely, 2^20711616 is an apocalyptic number.

It is an amenable number.

20711616 is an abundant number, since it is smaller than the sum of its proper divisors (34088376).

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

20711616 is a wasteful number, since it uses less digits than its factorization.

20711616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107888 (or 107878 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 20711616 is about 4551.0016479892. The cubic root of 20711616 is about 274.6236880417.

The spelling of 20711616 in words is "twenty million, seven hundred eleven thousand, six hundred sixteen".