20727950345 has 24 divisors (see below), whose sum is σ = 26268883200. Its totient is φ = 15699250080.

The previous prime is 20727950333. The next prime is 20727950363. The reversal of 20727950345 is 54305972702.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20727950345 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20727950296 and 20727950305.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3785960 + ... + 3791430.

It is an arithmetic number, because the mean of its divisors is an integer number (1094536800).

Almost surely, 2^20727950345 is an apocalyptic number.

It is an amenable number.

20727950345 is a deficient number, since it is larger than the sum of its proper divisors (5540932855).

20727950345 is a wasteful number, since it uses less digits than its factorization.

20727950345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7613 (or 7594 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 44.

The spelling of 20727950345 in words is "twenty billion, seven hundred twenty-seven million, nine hundred fifty thousand, three hundred forty-five".