20623643075 has 36 divisors (see below), whose sum is σ = 31498499592. Its totient is φ = 13310035200.

The previous prime is 20623643063. The next prime is 20623643077. The reversal of 20623643075 is 57034632602.

It is a happy number.

It is not a de Polignac number, because 20623643075 - 2¹⁴ = 20623626691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20623643077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 474341 + ... + 515990.

It is an arithmetic number, because the mean of its divisors is an integer number (874958322).

Almost surely, 2^20623643075 is an apocalyptic number.

20623643075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20623643075 is a deficient number, since it is larger than the sum of its proper divisors (10874856517).

20623643075 is a wasteful number, since it uses less digits than its factorization.

20623643075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990372 (or 990360 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 38.

The spelling of 20623643075 in words is "twenty billion, six hundred twenty-three million, six hundred forty-three thousand, seventy-five".