20842888 has 32 divisors (see below), whose sum is σ = 42809760. Its totient is φ = 9434880.

The previous prime is 20842879. The next prime is 20842889. The reversal of 20842888 is 88824802.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20842888.

It is not an unprimeable number, because it can be changed into a prime (20842889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37831 + ... + 38377.

It is an arithmetic number, because the mean of its divisors is an integer number (1337805).

Almost surely, 2^20842888 is an apocalyptic number.

It is an amenable number.

20842888 is an abundant number, since it is smaller than the sum of its proper divisors (21966872).

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

20842888 is a wasteful number, since it uses less digits than its factorization.

20842888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 40.

The square root of 20842888 is about 4565.4011871905. The cubic root of 20842888 is about 275.2026627311.

The spelling of 20842888 in words is "twenty million, eight hundred forty-two thousand, eight hundred eighty-eight".