20536391077 has 8 divisors (see below), whose sum is σ = 20976671232. Its totient is φ = 20096250000.

The previous prime is 20536391069. The next prime is 20536391107. The reversal of 20536391077 is 77019363502.

It is a happy number.

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 20536391077 - 2³ = 20536391069 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 (20536391377) 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, 297327 + ... + 359827.

It is an arithmetic number, because the mean of its divisors is an integer number (2622083904).

Almost surely, 2^20536391077 is an apocalyptic number.

It is an amenable number.

20536391077 is a deficient number, since it is larger than the sum of its proper divisors (440280155).

20536391077 is an equidigital number, since it uses as much as digits as its factorization.

20536391077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69539.

The product of its (nonzero) digits is 238140, while the sum is 43.

The spelling of 20536391077 in words is "twenty billion, five hundred thirty-six million, three hundred ninety-one thousand, seventy-seven".