20540355707 has 8 divisors (see below), whose sum is σ = 21662937360. Its totient is φ = 19421925120.

The previous prime is 20540355697. The next prime is 20540355739. The reversal of 20540355707 is 70755304502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20540355707 - 2¹⁰ = 20540354683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20540355307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1027598 + ... + 1047395.

It is an arithmetic number, because the mean of its divisors is an integer number (2707867170).

Almost surely, 2^20540355707 is an apocalyptic number.

20540355707 is a deficient number, since it is larger than the sum of its proper divisors (1122581653).

20540355707 is a wasteful number, since it uses less digits than its factorization.

20540355707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2075533.

The product of its (nonzero) digits is 147000, while the sum is 38.

The spelling of 20540355707 in words is "twenty billion, five hundred forty million, three hundred fifty-five thousand, seven hundred seven".