20123645106 has 8 divisors (see below), whose sum is σ = 40247290224. Its totient is φ = 6707881700.

The previous prime is 20123645089. The next prime is 20123645117. The reversal of 20123645106 is 60154632102.

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

20123645106 is an admirable number.

It is a super-2 number, since 2×20123645106² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1676970420 + ... + 1676970431.

It is an arithmetic number, because the mean of its divisors is an integer number (5030911278).

Almost surely, 2^20123645106 is an apocalyptic number.

20123645106 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123645106 is a wasteful number, since it uses less digits than its factorization.

20123645106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3353940856.

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 20123645106 in words is "twenty billion, one hundred twenty-three million, six hundred forty-five thousand, one hundred six".