20387871772 has 24 divisors (see below), whose sum is σ = 36053161200. Its totient is φ = 10087262976.

The previous prime is 20387871767. The next prime is 20387871787. The reversal of 20387871772 is 27717878302.

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, 243354 + ... + 316222.

It is an arithmetic number, because the mean of its divisors is an integer number (1502215050).

Almost surely, 2^20387871772 is an apocalyptic number.

It is an amenable number.

20387871772 is a deficient number, since it is larger than the sum of its proper divisors (15665289428).

20387871772 is a wasteful number, since it uses less digits than its factorization.

20387871772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73605 (or 73603 counting only the distinct ones).

The product of its (nonzero) digits is 1843968, while the sum is 52.

The spelling of 20387871772 in words is "twenty billion, three hundred eighty-seven million, eight hundred seventy-one thousand, seven hundred seventy-two".