20534215484 has 48 divisors (see below), whose sum is σ = 38799673920. Its totient is φ = 9488693760.

The previous prime is 20534215483. The next prime is 20534215511. The reversal of 20534215484 is 48451243502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20534215483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211337 + ... + 292799.

It is an arithmetic number, because the mean of its divisors is an integer number (808326540).

Almost surely, 2^20534215484 is an apocalyptic number.

It is an amenable number.

20534215484 is a deficient number, since it is larger than the sum of its proper divisors (18265458436).

20534215484 is a wasteful number, since it uses less digits than its factorization.

20534215484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81590 (or 81588 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 38.

Adding to 20534215484 its reverse (48451243502), we get a palindrome (68985458986).

The spelling of 20534215484 in words is "twenty billion, five hundred thirty-four million, two hundred fifteen thousand, four hundred eighty-four".