20421001041 has 16 divisors (see below), whose sum is σ = 31247923200. Its totient is φ = 11620315728.

The previous prime is 20421001037. The next prime is 20421001057. The reversal of 20421001041 is 14010012402.

It is not a de Polignac number, because 20421001041 - 2² = 20421001037 is a prime.

It is a super-3 number, since 3×20421001041³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20421001041.

It is not an unprimeable number, because it can be changed into a prime (20421001841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2029351 + ... + 2039388.

It is an arithmetic number, because the mean of its divisors is an integer number (1952995200).

Almost surely, 2^20421001041 is an apocalyptic number.

20421001041 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20421001041 is a deficient number, since it is larger than the sum of its proper divisors (10826922159).

20421001041 is a wasteful number, since it uses less digits than its factorization.

20421001041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4068988.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20421001041 its reverse (14010012402), we get a palindrome (34431013443).

The spelling of 20421001041 in words is "twenty billion, four hundred twenty-one million, one thousand, forty-one".