20123002154 has 16 divisors (see below), whose sum is σ = 31889721600. Its totient is φ = 9507858864.

The previous prime is 20123002103. The next prime is 20123002169. The reversal of 20123002154 is 45120032102.

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, 3688214 + ... + 3693665.

It is an arithmetic number, because the mean of its divisors is an integer number (1993107600).

Almost surely, 2^20123002154 is an apocalyptic number.

20123002154 is a deficient number, since it is larger than the sum of its proper divisors (11766719446).

20123002154 is a wasteful number, since it uses less digits than its factorization.

20123002154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7381957.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 20123002154 its reverse (45120032102), we get a palindrome (65243034256).

The spelling of 20123002154 in words is "twenty billion, one hundred twenty-three million, two thousand, one hundred fifty-four".