20340140745 has 32 divisors (see below), whose sum is σ = 33010412544. Its totient is φ = 10692864000.

The previous prime is 20340140741. The next prime is 20340140753. The reversal of 20340140745 is 54704104302.

It is not a de Polignac number, because 20340140745 - 2² = 20340140741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20340140741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2131585 + ... + 2141105.

It is an arithmetic number, because the mean of its divisors is an integer number (1031575392).

Almost surely, 2^20340140745 is an apocalyptic number.

It is an amenable number.

20340140745 is a deficient number, since it is larger than the sum of its proper divisors (12670271799).

20340140745 is a wasteful number, since it uses less digits than its factorization.

20340140745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11553.

The product of its (nonzero) digits is 13440, while the sum is 30.

The spelling of 20340140745 in words is "twenty billion, three hundred forty million, one hundred forty thousand, seven hundred forty-five".