20154421426 has 16 divisors (see below), whose sum is σ = 30354353280. Its totient is φ = 10036383840.

The previous prime is 20154421423. The next prime is 20154421433. The reversal of 20154421426 is 62412445102.

It is not an unprimeable number, because it can be changed into a prime (20154421423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496635 + ... + 535681.

It is an arithmetic number, because the mean of its divisors is an integer number (1897147080).

Almost surely, 2^20154421426 is an apocalyptic number.

20154421426 is a deficient number, since it is larger than the sum of its proper divisors (10199931854).

20154421426 is a wasteful number, since it uses less digits than its factorization.

20154421426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40089.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 20154421426 its reverse (62412445102), we get a palindrome (82566866528).

The spelling of 20154421426 in words is "twenty billion, one hundred fifty-four million, four hundred twenty-one thousand, four hundred twenty-six".