20408490974 has 8 divisors (see below), whose sum is σ = 30621586800. Its totient is φ = 10201295376.

The previous prime is 20408490931. The next prime is 20408491009. The reversal of 20408490974 is 47909480402.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1466399 + ... + 1480250.

It is an arithmetic number, because the mean of its divisors is an integer number (3827698350).

Almost surely, 2^20408490974 is an apocalyptic number.

20408490974 is a deficient number, since it is larger than the sum of its proper divisors (10213095826).

20408490974 is a wasteful number, since it uses less digits than its factorization.

20408490974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950114.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 20408490974 in words is "twenty billion, four hundred eight million, four hundred ninety thousand, nine hundred seventy-four".