20534135260 has 48 divisors (see below), whose sum is σ = 45049116672. Its totient is φ = 7852910400.

The previous prime is 20534135249. The next prime is 20534135317. The reversal of 20534135260 is 6253143502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148056 + ... + 250975.

It is an arithmetic number, because the mean of its divisors is an integer number (938523264).

Almost surely, 2^20534135260 is an apocalyptic number.

20534135260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20534135260 is an abundant number, since it is smaller than the sum of its proper divisors (24514981412).

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

20534135260 is a wasteful number, since it uses less digits than its factorization.

20534135260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399154 (or 399152 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 20534135260 its reverse (6253143502), we get a palindrome (26787278762).

The spelling of 20534135260 in words is "twenty billion, five hundred thirty-four million, one hundred thirty-five thousand, two hundred sixty".