20345235154 has 16 divisors (see below), whose sum is σ = 30765044736. Its totient is φ = 10090256400.

The previous prime is 20345235151. The next prime is 20345235161. The reversal of 20345235154 is 45153254302.

It is not an unprimeable number, because it can be changed into a prime (20345235151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2101084 + ... + 2110744.

It is an arithmetic number, because the mean of its divisors is an integer number (1922815296).

Almost surely, 2^20345235154 is an apocalyptic number.

20345235154 is a deficient number, since it is larger than the sum of its proper divisors (10419809582).

20345235154 is a wasteful number, since it uses less digits than its factorization.

20345235154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18081.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 20345235154 its reverse (45153254302), we get a palindrome (65498489456).

The spelling of 20345235154 in words is "twenty billion, three hundred forty-five million, two hundred thirty-five thousand, one hundred fifty-four".