20505021870350 has 24 divisors (see below), whose sum is σ = 38139460627368. Its totient is φ = 8201982952800.

The previous prime is 20505021870349. The next prime is 20505021870373. The reversal of 20505021870350 is 5307812050502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28084112 + ... + 28804988.

It is an arithmetic number, because the mean of its divisors is an integer number (1589144192807).

Almost surely, 2^{20505021870350} is an apocalyptic number.

20505021870350 is a deficient number, since it is larger than the sum of its proper divisors (17634438757018).

20505021870350 is a wasteful number, since it uses less digits than its factorization.

20505021870350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289780 (or 1289775 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 38.

The spelling of 20505021870350 in words is "twenty trillion, five hundred five billion, twenty-one million, eight hundred seventy thousand, three hundred fifty".