20761928 has 32 divisors (see below), whose sum is σ = 42815520. Its totient is φ = 9360000.

The previous prime is 20761919. The next prime is 20761933. The reversal of 20761928 is 82916702.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10628 + ... + 12428.

It is an arithmetic number, because the mean of its divisors is an integer number (1337985).

Almost surely, 2^20761928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20761928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21407760).

20761928 is an abundant number, since it is smaller than the sum of its proper divisors (22053592).

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

20761928 is a wasteful number, since it uses less digits than its factorization.

20761928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949 (or 1945 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 20761928 is about 4556.5258695633. The cubic root of 20761928 is about 274.8458772750.

It can be divided in two parts, 2076 and 1928, that added together give a palindrome (4004).

The spelling of 20761928 in words is "twenty million, seven hundred sixty-one thousand, nine hundred twenty-eight".