20423455432402 has 16 divisors (see below), whose sum is σ = 33675315832224. Its totient is φ = 9212523268000.

The previous prime is 20423455432399. The next prime is 20423455432403.

20423455432402 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (20423455432403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3543275299 + ... + 3543281062.

It is an arithmetic number, because the mean of its divisors is an integer number (2104707239514).

Almost surely, 2^{20423455432402} is an apocalyptic number.

20423455432402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20423455432402 is a deficient number, since it is larger than the sum of its proper divisors (13251860399822).

20423455432402 is a wasteful number, since it uses less digits than its factorization.

20423455432402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7086556505.

The product of its (nonzero) digits is 921600, while the sum is 40.

It can be divided in two parts, 2042345 and 5432402, that added together give a palindrome (7474747).

The spelling of 20423455432402 in words is "twenty trillion, four hundred twenty-three billion, four hundred fifty-five million, four hundred thirty-two thousand, four hundred two".