20493840470 has 16 divisors (see below), whose sum is σ = 36946473408. Its totient is φ = 8184744960.

The previous prime is 20493840431. The next prime is 20493840487. The reversal of 20493840470 is 7404839402.

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 7 ways as a sum of consecutive naturals, for example, 1592174 + ... + 1604993.

It is an arithmetic number, because the mean of its divisors is an integer number (2309154588).

Almost surely, 2^20493840470 is an apocalyptic number.

20493840470 is a deficient number, since it is larger than the sum of its proper divisors (16452632938).

20493840470 is a wasteful number, since it uses less digits than its factorization.

20493840470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3197815.

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 20493840470 in words is "twenty billion, four hundred ninety-three million, eight hundred forty thousand, four hundred seventy".