20078077463 has 4 divisors (see below), whose sum is σ = 20079393048. Its totient is φ = 20076761880.

The previous prime is 20078077429. The next prime is 20078077469. The reversal of 20078077463 is 36477087002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36477087002 = 2 ⋅18238543501.

It is a cyclic number.

It is not a de Polignac number, because 20078077463 - 2⁸ = 20078077207 is a prime.

It is a super-2 number, since 2×20078077463² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20078077469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634628 + ... + 665513.

It is an arithmetic number, because the mean of its divisors is an integer number (5019848262).

Almost surely, 2^20078077463 is an apocalyptic number.

20078077463 is a deficient number, since it is larger than the sum of its proper divisors (1315585).

20078077463 is a wasteful number, since it uses less digits than its factorization.

20078077463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315584.

The product of its (nonzero) digits is 395136, while the sum is 44.

The spelling of 20078077463 in words is "twenty billion, seventy-eight million, seventy-seven thousand, four hundred sixty-three".