20761788 has 12 divisors (see below), whose sum is σ = 48444200. Its totient is φ = 6920592.

The previous prime is 20761787. The next prime is 20761823. The reversal of 20761788 is 88716702.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20761781) 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, 865063 + ... + 865086.

Almost surely, 2^20761788 is an apocalyptic number.

It is an amenable number.

20761788 is an abundant number, since it is smaller than the sum of its proper divisors (27682412).

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

20761788 is a wasteful number, since it uses less digits than its factorization.

20761788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730156 (or 1730154 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 20761788 is about 4556.5105069560. The cubic root of 20761788 is about 274.8452595015.

The spelling of 20761788 in words is "twenty million, seven hundred sixty-one thousand, seven hundred eighty-eight".