20401421415 has 16 divisors (see below), whose sum is σ = 32649540576. Its totient is φ = 10878336000.

The previous prime is 20401421413. The next prime is 20401421419. The reversal of 20401421415 is 51412410402.

It is not a de Polignac number, because 20401421415 - 2¹ = 20401421413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401421413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80686 + ... + 217515.

It is an arithmetic number, because the mean of its divisors is an integer number (2040596286).

Almost surely, 2^20401421415 is an apocalyptic number.

20401421415 is a deficient number, since it is larger than the sum of its proper divisors (12248119161).

20401421415 is a wasteful number, since it uses less digits than its factorization.

20401421415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302770.

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 20401421415 its reverse (51412410402), we get a palindrome (71813831817).

The spelling of 20401421415 in words is "twenty billion, four hundred one million, four hundred twenty-one thousand, four hundred fifteen".