20211421426 has 16 divisors (see below), whose sum is σ = 34664995584. Its totient is φ = 8657826624.

The previous prime is 20211421411. The next prime is 20211421427. The reversal of 20211421426 is 62412411202.

It is a self number, because there is not a number n which added to its sum of digits gives 20211421426.

It is not an unprimeable number, because it can be changed into a prime (20211421427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321015 + ... + 378778.

It is an arithmetic number, because the mean of its divisors is an integer number (2166562224).

Almost surely, 2^20211421426 is an apocalyptic number.

20211421426 is a deficient number, since it is larger than the sum of its proper divisors (14453574158).

20211421426 is a wasteful number, since it uses less digits than its factorization.

20211421426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701865.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 20211421426 its reverse (62412411202), we get a palindrome (82623832628).

The spelling of 20211421426 in words is "twenty billion, two hundred eleven million, four hundred twenty-one thousand, four hundred twenty-six".