20445779758 has 8 divisors (see below), whose sum is σ = 32002090128. Its totient is φ = 9778416384.

The previous prime is 20445779747. The next prime is 20445779801. The reversal of 20445779758 is 85797754402.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222236691 + ... + 222236782.

It is an arithmetic number, because the mean of its divisors is an integer number (4000261266).

Almost surely, 2^20445779758 is an apocalyptic number.

20445779758 is a deficient number, since it is larger than the sum of its proper divisors (11556310370).

20445779758 is a wasteful number, since it uses less digits than its factorization.

20445779758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444473498.

The product of its (nonzero) digits is 19756800, while the sum is 58.

The spelling of 20445779758 in words is "twenty billion, four hundred forty-five million, seven hundred seventy-nine thousand, seven hundred fifty-eight".