20351634221630 has 64 divisors (see below), whose sum is σ = 39474340761600. Its totient is φ = 7532553346560.

The previous prime is 20351634221623. The next prime is 20351634221651. The reversal of 20351634221630 is 3612243615302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17540966 + ... + 18665174.

It is an arithmetic number, because the mean of its divisors is an integer number (616786574400).

Almost surely, 2^{20351634221630} is an apocalyptic number.

20351634221630 is a deficient number, since it is larger than the sum of its proper divisors (19122706539970).

20351634221630 is a wasteful number, since it uses less digits than its factorization.

20351634221630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126809.

The product of its (nonzero) digits is 155520, while the sum is 38.

Adding to 20351634221630 its reverse (3612243615302), we get a palindrome (23963877836932).

The spelling of 20351634221630 in words is "twenty trillion, three hundred fifty-one billion, six hundred thirty-four million, two hundred twenty-one thousand, six hundred thirty".