20779633742 has 24 divisors (see below), whose sum is σ = 36399467664. Its totient is φ = 8870894592.

The previous prime is 20779633723. The next prime is 20779633753. The reversal of 20779633742 is 24733697702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 387338 + ... + 437709.

It is an arithmetic number, because the mean of its divisors is an integer number (1516644486).

Almost surely, 2^20779633742 is an apocalyptic number.

20779633742 is a deficient number, since it is larger than the sum of its proper divisors (15619833922).

20779633742 is a wasteful number, since it uses less digits than its factorization.

20779633742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825320 (or 825313 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 50.

The spelling of 20779633742 in words is "twenty billion, seven hundred seventy-nine million, six hundred thirty-three thousand, seven hundred forty-two".