20535254340 has 48 divisors (see below), whose sum is σ = 60524963520. Its totient is φ = 5187853440.

The previous prime is 20535254339. The next prime is 20535254347. The reversal of 20535254340 is 4345253502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20535254347) 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, 9005551 + ... + 9007830.

It is an arithmetic number, because the mean of its divisors is an integer number (1260936740).

Almost surely, 2^20535254340 is an apocalyptic number.

20535254340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20535254340 is an abundant number, since it is smaller than the sum of its proper divisors (39989709180).

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

20535254340 is a wasteful number, since it uses less digits than its factorization.

20535254340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18013412 (or 18013410 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 33.

The spelling of 20535254340 in words is "twenty billion, five hundred thirty-five million, two hundred fifty-four thousand, three hundred forty".