20759267381 has 4 divisors (see below), whose sum is σ = 20891492172. Its totient is φ = 20627042592.

The previous prime is 20759267371. The next prime is 20759267383. The reversal of 20759267381 is 18376295702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7664127025 + 13095140356 = 87545^2 + 114434^2 .

It is a cyclic number.

It is not a de Polignac number, because 20759267381 - 2³⁰ = 19685525557 is a prime.

It is a super-2 number, since 2×20759267381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20759267383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66112160 + ... + 66112473.

It is an arithmetic number, because the mean of its divisors is an integer number (5222873043).

Almost surely, 2^20759267381 is an apocalyptic number.

It is an amenable number.

20759267381 is a deficient number, since it is larger than the sum of its proper divisors (132224791).

20759267381 is a wasteful number, since it uses less digits than its factorization.

20759267381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132224790.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 20759267381 in words is "twenty billion, seven hundred fifty-nine million, two hundred sixty-seven thousand, three hundred eighty-one".