20123520154 has 8 divisors (see below), whose sum is σ = 30235010688. Its totient is φ = 10045183260.

The previous prime is 20123520139. The next prime is 20123520169. The reversal of 20123520154 is 45102532102.

It is an interprime number because it is at equal distance from previous prime (20123520139) and next prime (20123520169).

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

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, 8286892 + ... + 8289319.

It is an arithmetic number, because the mean of its divisors is an integer number (3779376336).

Almost surely, 2^20123520154 is an apocalyptic number.

20123520154 is a deficient number, since it is larger than the sum of its proper divisors (10111490534).

20123520154 is a wasteful number, since it uses less digits than its factorization.

20123520154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16576820.

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 20123520154 in words is "twenty billion, one hundred twenty-three million, five hundred twenty thousand, one hundred fifty-four".