20475745340 has 24 divisors (see below), whose sum is σ = 43002710352. Its totient is φ = 8189603840.

The previous prime is 20475745337. The next prime is 20475745363. The reversal of 20475745340 is 4354757402.

It is a super-2 number, since 2×20475745340² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245267 + ... + 317973.

It is an arithmetic number, because the mean of its divisors is an integer number (1791779598).

Almost surely, 2^20475745340 is an apocalyptic number.

20475745340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20475745340 is an abundant number, since it is smaller than the sum of its proper divisors (22526965012).

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

20475745340 is a wasteful number, since it uses less digits than its factorization.

20475745340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86797 (or 86795 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 41.

The spelling of 20475745340 in words is "twenty billion, four hundred seventy-five million, seven hundred forty-five thousand, three hundred forty".