20874456547 has 8 divisors (see below), whose sum is σ = 23937945696. Its totient is φ = 17831323392.

The previous prime is 20874456523. The next prime is 20874456557. The reversal of 20874456547 is 74565447802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20874456547 is a prime.

It is a super-2 number, since 2×20874456547² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20874456494 and 20874456503.

It is not an unprimeable number, because it can be changed into a prime (20874456517) 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, 5086798 + ... + 5090899.

It is an arithmetic number, because the mean of its divisors is an integer number (2992243212).

Almost surely, 2^20874456547 is an apocalyptic number.

20874456547 is a deficient number, since it is larger than the sum of its proper divisors (3063489149).

20874456547 is a wasteful number, since it uses less digits than its factorization.

20874456547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10177997.

The product of its (nonzero) digits is 7526400, while the sum is 52.

The spelling of 20874456547 in words is "twenty billion, eight hundred seventy-four million, four hundred fifty-six thousand, five hundred forty-seven".