20761888 has 36 divisors (see below), whose sum is σ = 47552022. Its totient is φ = 8897280.

The previous prime is 20761877. The next prime is 20761901. The reversal of 20761888 is 88816702.

It can be written as a sum of positive squares in only one way, i.e., 11102224 + 9659664 = 3332^2 + 3108^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20761888.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5053 + ... + 8188.

Almost surely, 2^20761888 is an apocalyptic number.

20761888 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20761888 is an abundant number, since it is smaller than the sum of its proper divisors (26790134).

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

20761888 is a wasteful number, since it uses less digits than its factorization.

20761888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13265 (or 13250 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 20761888 is about 4556.5214802522. The cubic root of 20761888 is about 274.8457007686.

The spelling of 20761888 in words is "twenty million, seven hundred sixty-one thousand, eight hundred eighty-eight".