20049988 has 24 divisors (see below), whose sum is σ = 40219200. Its totient is φ = 8567328.

The previous prime is 20049983. The next prime is 20049989. The reversal of 20049988 is 88994002.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20049988.

It is not an unprimeable number, because it can be changed into a prime (20049983) 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, 10878 + ... + 12586.

It is an arithmetic number, because the mean of its divisors is an integer number (1675800).

Almost surely, 2^20049988 is an apocalyptic number.

20049988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20049988 is an abundant number, since it is smaller than the sum of its proper divisors (20169212).

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

20049988 is a wasteful number, since it uses less digits than its factorization.

20049988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139 (or 2137 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 20049988 is about 4477.7212954805. The cubic root of 20049988 is about 271.6677206896.

The spelling of 20049988 in words is "twenty million, forty-nine thousand, nine hundred eighty-eight".