20267822087 has 4 divisors (see below), whose sum is σ = 20270274936. Its totient is φ = 20265369240.

The previous prime is 20267822053. The next prime is 20267822123. The reversal of 20267822087 is 78022876202.

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

It is a cyclic number.

It is not a de Polignac number, because 20267822087 - 2⁸ = 20267821831 is a prime.

It is a super-2 number, since 2×20267822087² (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 (20267822027) 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, 1213988 + ... + 1230569.

It is an arithmetic number, because the mean of its divisors is an integer number (5067568734).

Almost surely, 2^20267822087 is an apocalyptic number.

20267822087 is a deficient number, since it is larger than the sum of its proper divisors (2452849).

20267822087 is an equidigital number, since it uses as much as digits as its factorization.

20267822087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452848.

The product of its (nonzero) digits is 301056, while the sum is 44.

The spelling of 20267822087 in words is "twenty billion, two hundred sixty-seven million, eight hundred twenty-two thousand, eighty-seven".