20265057647 has 8 divisors (see below), whose sum is σ = 20964557952. Its totient is φ = 19568419200.

The previous prime is 20265057623. The next prime is 20265057713. The reversal of 20265057647 is 74675056202.

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 20265057647 - 2¹² = 20265053551 is a prime.

It is a super-2 number, since 2×20265057647² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20265057598 and 20265057607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20265057607) 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, 701054 + ... + 729387.

It is an arithmetic number, because the mean of its divisors is an integer number (2620569744).

Almost surely, 2^20265057647 is an apocalyptic number.

20265057647 is a deficient number, since it is larger than the sum of its proper divisors (699500305).

20265057647 is a wasteful number, since it uses less digits than its factorization.

20265057647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430929.

The product of its (nonzero) digits is 705600, while the sum is 44.

The spelling of 20265057647 in words is "twenty billion, two hundred sixty-five million, fifty-seven thousand, six hundred forty-seven".