20477025839 has 4 divisors (see below), whose sum is σ = 20477620824. Its totient is φ = 20476430856.

The previous prime is 20477025797. The next prime is 20477025841. The reversal of 20477025839 is 93852077402.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20477025839 - 2¹² = 20477021743 is a prime.

It is a super-2 number, since 2×20477025839² (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 = 20477025793 and 20477025802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20477025859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242477 + ... + 315830.

It is an arithmetic number, because the mean of its divisors is an integer number (5119405206).

Almost surely, 2^20477025839 is an apocalyptic number.

20477025839 is a deficient number, since it is larger than the sum of its proper divisors (594985).

20477025839 is an equidigital number, since it uses as much as digits as its factorization.

20477025839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594984.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 20477025839 in words is "twenty billion, four hundred seventy-seven million, twenty-five thousand, eight hundred thirty-nine".