20077648147 has 4 divisors (see below), whose sum is σ = 20080624536. Its totient is φ = 20074671760.

The previous prime is 20077648127. The next prime is 20077648177. The reversal of 20077648147 is 74184677002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20077648147 is a prime.

It is a super-2 number, since 2×20077648147² (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 = 20077648097 and 20077648106.

It is not an unprimeable number, because it can be changed into a prime (20077648117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1478053 + ... + 1491574.

It is an arithmetic number, because the mean of its divisors is an integer number (5020156134).

Almost surely, 2^20077648147 is an apocalyptic number.

20077648147 is a deficient number, since it is larger than the sum of its proper divisors (2976389).

20077648147 is an equidigital number, since it uses as much as digits as its factorization.

20077648147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976388.

The product of its (nonzero) digits is 526848, while the sum is 46.

The spelling of 20077648147 in words is "twenty billion, seventy-seven million, six hundred forty-eight thousand, one hundred forty-seven".