20719720374 has 16 divisors (see below), whose sum is σ = 41717559600. Its totient is φ = 6860220320.

The previous prime is 20719720369. The next prime is 20719720403. The reversal of 20719720374 is 47302791702.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11587317 + ... + 11589104.

It is an arithmetic number, because the mean of its divisors is an integer number (2607347475).

Almost surely, 2^20719720374 is an apocalyptic number.

20719720374 is an abundant number, since it is smaller than the sum of its proper divisors (20997839226).

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

20719720374 is a wasteful number, since it uses less digits than its factorization.

20719720374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23176575.

The product of its (nonzero) digits is 148176, while the sum is 42.

The spelling of 20719720374 in words is "twenty billion, seven hundred nineteen million, seven hundred twenty thousand, three hundred seventy-four".