20401720712 has 16 divisors (see below), whose sum is σ = 38714109840. Its totient is φ = 10077958096.

The previous prime is 20401720693. The next prime is 20401720721. The reversal of 20401720712 is 21702710402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15362078 + ... + 15363405.

It is an arithmetic number, because the mean of its divisors is an integer number (2419631865).

Almost surely, 2^20401720712 is an apocalyptic number.

It is an amenable number.

20401720712 is a deficient number, since it is larger than the sum of its proper divisors (18312389128).

20401720712 is a wasteful number, since it uses less digits than its factorization.

20401720712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30725572 (or 30725568 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The spelling of 20401720712 in words is "twenty billion, four hundred one million, seven hundred twenty thousand, seven hundred twelve".