20862984 has 16 divisors (see below), whose sum is σ = 52157520. Its totient is φ = 6954320.

The previous prime is 20862983. The next prime is 20862997. The reversal of 20862984 is 48926802.

It is not an unprimeable number, because it can be changed into a prime (20862983) 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, 434622 + ... + 434669.

It is an arithmetic number, because the mean of its divisors is an integer number (3259845).

Almost surely, 2^20862984 is an apocalyptic number.

20862984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20862984 is an abundant number, since it is smaller than the sum of its proper divisors (31294536).

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

20862984 is a wasteful number, since it uses less digits than its factorization.

20862984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869300 (or 869296 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 20862984 is about 4567.6015588052. The cubic root of 20862984 is about 275.2910813199.

The spelling of 20862984 in words is "twenty million, eight hundred sixty-two thousand, nine hundred eighty-four".