20079540437 has 4 divisors (see below), whose sum is σ = 21904953216. Its totient is φ = 18254127660.

The previous prime is 20079540421. The next prime is 20079540457. The reversal of 20079540437 is 73404597002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20079540437 - 2⁴ = 20079540421 is a prime.

It is a super-2 number, since 2×20079540437² (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 = 20079540394 and 20079540403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20079540407) 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, 912706373 + ... + 912706394.

It is an arithmetic number, because the mean of its divisors is an integer number (5476238304).

Almost surely, 2^20079540437 is an apocalyptic number.

It is an amenable number.

20079540437 is a deficient number, since it is larger than the sum of its proper divisors (1825412779).

20079540437 is a wasteful number, since it uses less digits than its factorization.

20079540437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825412778.

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 20079540437 in words is "twenty billion, seventy-nine million, five hundred forty thousand, four hundred thirty-seven".