20641021026 has 64 divisors (see below), whose sum is σ = 42904857600. Its totient is φ = 6616500800.

The previous prime is 20641021003. The next prime is 20641021069. The reversal of 20641021026 is 62012014602.

It is a junction number, because it is equal to n+sod(n) for n = 20641020987 and 20641021005.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3289420 + ... + 3295688.

It is an arithmetic number, because the mean of its divisors is an integer number (670388400).

Almost surely, 2^20641021026 is an apocalyptic number.

20641021026 is an abundant number, since it is smaller than the sum of its proper divisors (22263836574).

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

20641021026 is a wasteful number, since it uses less digits than its factorization.

20641021026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6535.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 20641021026 its reverse (62012014602), we get a palindrome (82653035628).

The spelling of 20641021026 in words is "twenty billion, six hundred forty-one million, twenty-one thousand, twenty-six".