20266663623 has 16 divisors (see below), whose sum is σ = 27601814016. Its totient is φ = 13221408320.

The previous prime is 20266663603. The next prime is 20266663643. The reversal of 20266663623 is 32636666202.

It is an interprime number because it is at equal distance from previous prime (20266663603) and next prime (20266663643).

It is not a de Polignac number, because 20266663623 - 2⁵ = 20266663591 is a prime.

It is a super-2 number, since 2×20266663623² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20266663603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1449715 + ... + 1463627.

It is an arithmetic number, because the mean of its divisors is an integer number (1725113376).

Almost surely, 2^20266663623 is an apocalyptic number.

20266663623 is a deficient number, since it is larger than the sum of its proper divisors (7335150393).

20266663623 is a wasteful number, since it uses less digits than its factorization.

20266663623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24294.

The product of its (nonzero) digits is 559872, while the sum is 42.

The spelling of 20266663623 in words is "twenty billion, two hundred sixty-six million, six hundred sixty-three thousand, six hundred twenty-three".