20829954474 has 24 divisors (see below), whose sum is σ = 51578935200. Its totient is φ = 5951415528.

The previous prime is 20829954469. The next prime is 20829954479. The reversal of 20829954474 is 47445992802.

It is a happy number.

20829954474 is a `hidden beast` number, since 2 + 0 + 8 + 2 + 99 + 544 + 7 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (20829954469) and next prime (20829954479).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20829954474.

It is not an unprimeable number, because it can be changed into a prime (20829954479) 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 11 ways as a sum of consecutive naturals, for example, 82658424 + ... + 82658675.

It is an arithmetic number, because the mean of its divisors is an integer number (2149122300).

Almost surely, 2^20829954474 is an apocalyptic number.

20829954474 is an abundant number, since it is smaller than the sum of its proper divisors (30748980726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20829954474 is a wasteful number, since it uses less digits than its factorization.

20829954474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165317114 (or 165317111 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 20829954474 in words is "twenty billion, eight hundred twenty-nine million, nine hundred fifty-four thousand, four hundred seventy-four".