20466777247 has 8 divisors (see below), whose sum is σ = 23397527552. Its totient is φ = 17537758200.

The previous prime is 20466777239. The next prime is 20466777281. The reversal of 20466777247 is 74277766402.

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 20466777247 - 2³ = 20466777239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20466777194 and 20466777203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20466777047) 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, 407379 + ... + 454852.

It is an arithmetic number, because the mean of its divisors is an integer number (2924690944).

Almost surely, 2^20466777247 is an apocalyptic number.

20466777247 is a deficient number, since it is larger than the sum of its proper divisors (2930750305).

20466777247 is an equidigital number, since it uses as much as digits as its factorization.

20466777247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865629.

The product of its (nonzero) digits is 5531904, while the sum is 52.

The spelling of 20466777247 in words is "twenty billion, four hundred sixty-six million, seven hundred seventy-seven thousand, two hundred forty-seven".