20501423334 has 48 divisors (see below), whose sum is σ = 50882805792. Its totient is φ = 5844006144.

The previous prime is 20501423333. The next prime is 20501423381. The reversal of 20501423334 is 43332410502.

20501423334 is a `hidden beast` number, since 205 + 0 + 1 + 423 + 3 + 34 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20501423298 and 20501423307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20501423333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133329 + ... + 242444.

It is an arithmetic number, because the mean of its divisors is an integer number (1060058454).

Almost surely, 2^20501423334 is an apocalyptic number.

20501423334 is an abundant number, since it is smaller than the sum of its proper divisors (30381382458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20501423334 is a wasteful number, since it uses less digits than its factorization.

20501423334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376221 (or 376218 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 20501423334 its reverse (43332410502), we get a palindrome (63833833836).

The spelling of 20501423334 in words is "twenty billion, five hundred one million, four hundred twenty-three thousand, three hundred thirty-four".