20254457698 has 4 divisors (see below), whose sum is σ = 30381686550. Its totient is φ = 10127228848.

The previous prime is 20254457689. The next prime is 20254457701. The reversal of 20254457698 is 89675445202.

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., 15811302049 + 4443155649 = 125743^2 + 66657^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5063614423 + ... + 5063614426.

Almost surely, 2^20254457698 is an apocalyptic number.

20254457698 is a deficient number, since it is larger than the sum of its proper divisors (10127228852).

20254457698 is a wasteful number, since it uses less digits than its factorization.

20254457698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10127228851.

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 20254457698 in words is "twenty billion, two hundred fifty-four million, four hundred fifty-seven thousand, six hundred ninety-eight".