20049897751 has 8 divisors (see below), whose sum is σ = 21593352704. Its totient is φ = 18506607840.

The previous prime is 20049897719. The next prime is 20049897779. The reversal of 20049897751 is 15779894002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20049897751 - 2⁵ = 20049897719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20049897151) 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, 345130 + ... + 399016.

It is an arithmetic number, because the mean of its divisors is an integer number (2699169088).

Almost surely, 2^20049897751 is an apocalyptic number.

20049897751 is a deficient number, since it is larger than the sum of its proper divisors (1543454953).

20049897751 is a wasteful number, since it uses less digits than its factorization.

20049897751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82521.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The spelling of 20049897751 in words is "twenty billion, forty-nine million, eight hundred ninety-seven thousand, seven hundred fifty-one".