20451002213055 has 8 divisors (see below), whose sum is σ = 32721603540912. Its totient is φ = 10907201180288.

The previous prime is 20451002213053. The next prime is 20451002213069. The reversal of 20451002213055 is 55031220015402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20451002213055 - 2¹ = 20451002213053 is a prime.

It is a super-2 number, since 2×20451002213055² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20451002213053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681700073754 + ... + 681700073783.

It is an arithmetic number, because the mean of its divisors is an integer number (4090200442614).

Almost surely, 2^{20451002213055} is an apocalyptic number.

20451002213055 is a deficient number, since it is larger than the sum of its proper divisors (12270601327857).

20451002213055 is a wasteful number, since it uses less digits than its factorization.

20451002213055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363400147545.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 20451002213055 its reverse (55031220015402), we get a palindrome (75482222228457).

The spelling of 20451002213055 in words is "twenty trillion, four hundred fifty-one billion, two million, two hundred thirteen thousand, fifty-five".