20634213501264 has 80 divisors (see below), whose sum is σ = 58282232269824. Its totient is φ = 6238677244800.

The previous prime is 20634213501247. The next prime is 20634213501287. The reversal of 20634213501264 is 46210531243602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43874392 + ... + 44342199.

Almost surely, 2^{20634213501264} is an apocalyptic number.

20634213501264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20634213501264 is an abundant number, since it is smaller than the sum of its proper divisors (37648018768560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20634213501264 is a wasteful number, since it uses less digits than its factorization.

20634213501264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88217056 (or 88217050 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

Adding to 20634213501264 its reverse (46210531243602), we get a palindrome (66844744744866).

The spelling of 20634213501264 in words is "twenty trillion, six hundred thirty-four billion, two hundred thirteen million, five hundred one thousand, two hundred sixty-four".