20525374340 has 48 divisors (see below), whose sum is σ = 47344590720. Its totient is φ = 7439857920.

The previous prime is 20525374307. The next prime is 20525374343. The reversal of 20525374340 is 4347352502.

It is a self number, because there is not a number n which added to its sum of digits gives 20525374340.

It is not an unprimeable number, because it can be changed into a prime (20525374343) 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, 1165481 + ... + 1182960.

It is an arithmetic number, because the mean of its divisors is an integer number (986345640).

Almost surely, 2^20525374340 is an apocalyptic number.

20525374340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20525374340 is an abundant number, since it is smaller than the sum of its proper divisors (26819216380).

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

20525374340 is a wasteful number, since it uses less digits than its factorization.

20525374340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348492 (or 2348490 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 35.

The spelling of 20525374340 in words is "twenty billion, five hundred twenty-five million, three hundred seventy-four thousand, three hundred forty".