20761764 has 12 divisors (see below), whose sum is σ = 48444144. Its totient is φ = 6920584.

The previous prime is 20761757. The next prime is 20761771. The reversal of 20761764 is 46716702.

It is an interprime number because it is at equal distance from previous prime (20761757) and next prime (20761771).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865062 + ... + 865085.

It is an arithmetic number, because the mean of its divisors is an integer number (4037012).

Almost surely, 2^20761764 is an apocalyptic number.

It is an amenable number.

20761764 is an abundant number, since it is smaller than the sum of its proper divisors (27682380).

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

20761764 is a wasteful number, since it uses less digits than its factorization.

20761764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730154 (or 1730152 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 20761764 is about 4556.5078733609. The cubic root of 20761764 is about 274.8451535971.

The spelling of 20761764 in words is "twenty million, seven hundred sixty-one thousand, seven hundred sixty-four".