20247547307077 has 8 divisors (see below), whose sum is σ = 21313301458400. Its totient is φ = 19181802532464.

The previous prime is 20247547307059. The next prime is 20247547307083. The reversal of 20247547307077 is 77070374574202.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20247547307077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20247547317077) 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, 2326843 + ... + 6775639.

It is an arithmetic number, because the mean of its divisors is an integer number (2664162682300).

Almost surely, 2^{20247547307077} is an apocalyptic number.

It is an amenable number.

20247547307077 is a deficient number, since it is larger than the sum of its proper divisors (1065754151323).

20247547307077 is a wasteful number, since it uses less digits than its factorization.

20247547307077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4688355.

The product of its (nonzero) digits is 16134720, while the sum is 55.

The spelling of 20247547307077 in words is "twenty trillion, two hundred forty-seven billion, five hundred forty-seven million, three hundred seven thousand, seventy-seven".