20455102042 has 16 divisors (see below), whose sum is σ = 32300886240. Its totient is φ = 9688251888.

The previous prime is 20455101983. The next prime is 20455102043. The reversal of 20455102042 is 24020155402.

It is a super-2 number, since 2×20455102042² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20455101998 and 20455102016.

It is not an unprimeable number, because it can be changed into a prime (20455102043) 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, 447388 + ... + 490984.

It is an arithmetic number, because the mean of its divisors is an integer number (2018805390).

Almost surely, 2^20455102042 is an apocalyptic number.

20455102042 is a deficient number, since it is larger than the sum of its proper divisors (11845784198).

20455102042 is a wasteful number, since it uses less digits than its factorization.

20455102042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55965.

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 20455102042 its reverse (24020155402), we get a palindrome (44475257444).

The spelling of 20455102042 in words is "twenty billion, four hundred fifty-five million, one hundred two thousand, forty-two".