20423451542151 has 32 divisors (see below), whose sum is σ = 31149558469120. Its totient is φ = 11660004867456.

The previous prime is 20423451542147. The next prime is 20423451542167. The reversal of 20423451542151 is 15124515432402.

It is not a de Polignac number, because 20423451542151 - 2² = 20423451542147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423451544151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 330890145 + ... + 330951861.

It is an arithmetic number, because the mean of its divisors is an integer number (973423702160).

Almost surely, 2^{20423451542151} is an apocalyptic number.

20423451542151 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20423451542151 is a deficient number, since it is larger than the sum of its proper divisors (10726106926969).

20423451542151 is a wasteful number, since it uses less digits than its factorization.

20423451542151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75703.

The product of its (nonzero) digits is 192000, while the sum is 39.

Adding to 20423451542151 its reverse (15124515432402), we get a palindrome (35547966974553).

The spelling of 20423451542151 in words is "twenty trillion, four hundred twenty-three billion, four hundred fifty-one million, five hundred forty-two thousand, one hundred fifty-one".