21620363246 has 16 divisors (see below), whose sum is σ = 33050577744. Its totient is φ = 10603604544.

The previous prime is 21620363203. The next prime is 21620363329. The reversal of 21620363246 is 64236302612.

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, 449561 + ... + 495323.

It is an arithmetic number, because the mean of its divisors is an integer number (2065661109).

Almost surely, 2^21620363246 is an apocalyptic number.

21620363246 is a deficient number, since it is larger than the sum of its proper divisors (11430214498).

21620363246 is a wasteful number, since it uses less digits than its factorization.

21620363246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50275.

The product of its (nonzero) digits is 62208, while the sum is 35.

Adding to 21620363246 its reverse (64236302612), we get a palindrome (85856665858).

The spelling of 21620363246 in words is "twenty-one billion, six hundred twenty million, three hundred sixty-three thousand, two hundred forty-six".