20276991439 has 8 divisors (see below), whose sum is σ = 20739874320. Its totient is φ = 19818082176.

The previous prime is 20276991409. The next prime is 20276991467. The reversal of 20276991439 is 93419967202.

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 not a de Polignac number, because 20276991439 - 2²¹ = 20274894287 is a prime.

It is a super-2 number, since 2×20276991439² (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 (20276991409) 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 7 ways as a sum of consecutive naturals, for example, 983082 + ... + 1003495.

It is an arithmetic number, because the mean of its divisors is an integer number (2592484290).

Almost surely, 2^20276991439 is an apocalyptic number.

20276991439 is a deficient number, since it is larger than the sum of its proper divisors (462882881).

20276991439 is a wasteful number, since it uses less digits than its factorization.

20276991439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986809.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The spelling of 20276991439 in words is "twenty billion, two hundred seventy-six million, nine hundred ninety-one thousand, four hundred thirty-nine".