20351666870 has 16 divisors (see below), whose sum is σ = 36638388288. Its totient is φ = 8139469440.

The previous prime is 20351666837. The next prime is 20351666891. The reversal of 20351666870 is 7866615302.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 76574 + ... + 215793.

It is an arithmetic number, because the mean of its divisors is an integer number (2289899268).

Almost surely, 2^20351666870 is an apocalyptic number.

20351666870 is a deficient number, since it is larger than the sum of its proper divisors (16286721418).

20351666870 is a wasteful number, since it uses less digits than its factorization.

20351666870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299335.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 20351666870 in words is "twenty billion, three hundred fifty-one million, six hundred sixty-six thousand, eight hundred seventy".