20387746846 has 16 divisors (see below), whose sum is σ = 30674302848. Its totient is φ = 10163021400.

The previous prime is 20387746807. The next prime is 20387746861. The reversal of 20387746846 is 64864778302.

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, 1034101 + ... + 1053631.

It is an arithmetic number, because the mean of its divisors is an integer number (1917143928).

Almost surely, 2^20387746846 is an apocalyptic number.

20387746846 is a deficient number, since it is larger than the sum of its proper divisors (10286556002).

20387746846 is a wasteful number, since it uses less digits than its factorization.

20387746846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21087.

The product of its (nonzero) digits is 10838016, while the sum is 55.

The spelling of 20387746846 in words is "twenty billion, three hundred eighty-seven million, seven hundred forty-six thousand, eight hundred forty-six".