20488994 has 4 divisors (see below), whose sum is σ = 30733494. Its totient is φ = 10244496.

The previous prime is 20488943. The next prime is 20488997. The reversal of 20488994 is 49988402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19245769 + 1243225 = 4387^2 + 1115^2 .

It is not an unprimeable number, because it can be changed into a prime (20488997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5122247 + ... + 5122250.

Almost surely, 2^20488994 is an apocalyptic number.

20488994 is a deficient number, since it is larger than the sum of its proper divisors (10244500).

20488994 is a wasteful number, since it uses less digits than its factorization.

20488994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10244499.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 20488994 is about 4526.4769965173. The cubic root of 20488994 is about 273.6361964497.

It can be divided in two parts, 204 and 88994, that added together give a palindrome (89198).

The spelling of 20488994 in words is "twenty million, four hundred eighty-eight thousand, nine hundred ninety-four".