20445779762 has 8 divisors (see below), whose sum is σ = 30681579036. Its totient is φ = 10218586752.

The previous prime is 20445779747. The next prime is 20445779801. The reversal of 20445779762 is 26797754402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18681695761 + 1764084001 = 136681^2 + 42001^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2145623 + ... + 2155130.

Almost surely, 2^20445779762 is an apocalyptic number.

20445779762 is a deficient number, since it is larger than the sum of its proper divisors (10235799274).

20445779762 is a wasteful number, since it uses less digits than its factorization.

20445779762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4303132.

The product of its (nonzero) digits is 5927040, while the sum is 53.

The spelling of 20445779762 in words is "twenty billion, four hundred forty-five million, seven hundred seventy-nine thousand, seven hundred sixty-two".