20148984 has 24 divisors (see below), whose sum is σ = 54570360. Its totient is φ = 6716304.

The previous prime is 20148967. The next prime is 20149009. The reversal of 20148984 is 48984102.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139852 + ... + 139995.

It is an arithmetic number, because the mean of its divisors is an integer number (2273765).

Almost surely, 2^20148984 is an apocalyptic number.

20148984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20148984 is an abundant number, since it is smaller than the sum of its proper divisors (34421376).

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

20148984 is a wasteful number, since it uses less digits than its factorization.

20148984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279859 (or 279852 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 20148984 is about 4488.7619674026. The cubic root of 20148984 is about 272.1141029350.

The spelling of 20148984 in words is "twenty million, one hundred forty-eight thousand, nine hundred eighty-four".