20623666045 has 8 divisors (see below), whose sum is σ = 25352019000. Its totient is φ = 16096519680.

The previous prime is 20623666027. The next prime is 20623666067. The reversal of 20623666045 is 54066632602.

It can be written as a sum of positive squares in 4 ways, for example, as 91355364 + 20532310681 = 9558^2 + 143291^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20623666045 - 2⁷ = 20623665917 is a prime.

It is a super-2 number, since 2×20623666045² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20623665989 and 20623666007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50301420 + ... + 50301829.

It is an arithmetic number, because the mean of its divisors is an integer number (3169002375).

Almost surely, 2^20623666045 is an apocalyptic number.

It is an amenable number.

20623666045 is a deficient number, since it is larger than the sum of its proper divisors (4728352955).

20623666045 is a wasteful number, since it uses less digits than its factorization.

20623666045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100603295.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 20623666045 in words is "twenty billion, six hundred twenty-three million, six hundred sixty-six thousand, forty-five".