20455715561033 has 4 divisors (see below), whose sum is σ = 20581210748688. Its totient is φ = 20330220373380.

The previous prime is 20455715561023. The next prime is 20455715561041. The reversal of 20455715561033 is 33016551755402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20455715561033 - 2¹⁶ = 20455715495497 is a prime.

It is a super-2 number, since 2×20455715561033² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20455715561023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62747593583 + ... + 62747593908.

It is an arithmetic number, because the mean of its divisors is an integer number (5145302687172).

Almost surely, 2^{20455715561033} is an apocalyptic number.

It is an amenable number.

20455715561033 is a deficient number, since it is larger than the sum of its proper divisors (125495187655).

20455715561033 is a wasteful number, since it uses less digits than its factorization.

20455715561033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125495187654.

The product of its (nonzero) digits is 1890000, while the sum is 47.

The spelling of 20455715561033 in words is "twenty trillion, four hundred fifty-five billion, seven hundred fifteen million, five hundred sixty-one thousand, thirty-three".