20534615340 has 48 divisors (see below), whose sum is σ = 57710711520. Its totient is φ = 5455536640.

The previous prime is 20534615287. The next prime is 20534615347. The reversal of 20534615340 is 4351643502.

It is not an unprimeable number, because it can be changed into a prime (20534615347) 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, 620001 + ... + 652280.

It is an arithmetic number, because the mean of its divisors is an integer number (1202306490).

Almost surely, 2^20534615340 is an apocalyptic number.

20534615340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20534615340 is an abundant number, since it is smaller than the sum of its proper divisors (37176096180).

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

20534615340 is a wasteful number, since it uses less digits than its factorization.

20534615340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272562 (or 1272560 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The spelling of 20534615340 in words is "twenty billion, five hundred thirty-four million, six hundred fifteen thousand, three hundred forty".