20423135243151 has 32 divisors (see below), whose sum is σ = 30279613890240. Its totient is φ = 13605022425600.

The previous prime is 20423135243099. The next prime is 20423135243167. The reversal of 20423135243151 is 15134253132402.

20423135243151 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 313 + 5 + 24 + 315 + 1 = 666.

It is not a de Polignac number, because 20423135243151 - 2¹⁰ = 20423135242127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423135243851) 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, 836555821 + ... + 836580233.

It is an arithmetic number, because the mean of its divisors is an integer number (946237934070).

Almost surely, 2^{20423135243151} is an apocalyptic number.

20423135243151 is a deficient number, since it is larger than the sum of its proper divisors (9856478647089).

20423135243151 is a wasteful number, since it uses less digits than its factorization.

20423135243151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46824 (or 46818 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 20423135243151 its reverse (15134253132402), we get a palindrome (35557388375553).

The spelling of 20423135243151 in words is "twenty trillion, four hundred twenty-three billion, one hundred thirty-five million, two hundred forty-three thousand, one hundred fifty-one".