20261161799 has 8 divisors (see below), whose sum is σ = 21473781120. Its totient is φ = 19050852096.

The previous prime is 20261161793. The next prime is 20261161801. The reversal of 20261161799 is 99716116202.

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 20261161799 - 2⁴ = 20261161783 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 (20261161793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559319 + ... + 594440.

It is an arithmetic number, because the mean of its divisors is an integer number (2684222640).

Almost surely, 2^20261161799 is an apocalyptic number.

20261161799 is a deficient number, since it is larger than the sum of its proper divisors (1212619321).

20261161799 is a wasteful number, since it uses less digits than its factorization.

20261161799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154809.

The product of its (nonzero) digits is 81648, while the sum is 44.

The spelling of 20261161799 in words is "twenty billion, two hundred sixty-one million, one hundred sixty-one thousand, seven hundred ninety-nine".