20012998 has 4 divisors (see below), whose sum is σ = 30019500. Its totient is φ = 10006498.

The previous prime is 20012981. The next prime is 20012999. The reversal of 20012998 is 89921002.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003248 + ... + 5003251.

It is an arithmetic number, because the mean of its divisors is an integer number (7504875).

Almost surely, 2^20012998 is an apocalyptic number.

20012998 is a deficient number, since it is larger than the sum of its proper divisors (10006502).

20012998 is a wasteful number, since it uses less digits than its factorization.

20012998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10006501.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 20012998 is about 4473.5889395428. The cubic root of 20012998 is about 271.5005522590.

The spelling of 20012998 in words is "twenty million, twelve thousand, nine hundred ninety-eight".