20768498 has 4 divisors (see below), whose sum is σ = 31152750. Its totient is φ = 10384248.

The previous prime is 20768497. The next prime is 20768549. The reversal of 20768498 is 89486702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89486702 = 2 ⋅44743351.

It can be written as a sum of positive squares in only one way, i.e., 19070689 + 1697809 = 4367^2 + 1303^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20768491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5192123 + ... + 5192126.

Almost surely, 2^20768498 is an apocalyptic number.

20768498 is a deficient number, since it is larger than the sum of its proper divisors (10384252).

20768498 is a wasteful number, since it uses less digits than its factorization.

20768498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10384251.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 20768498 is about 4557.2467565406. The cubic root of 20768498 is about 274.8748653821.

The spelling of 20768498 in words is "twenty million, seven hundred sixty-eight thousand, four hundred ninety-eight".