20402231454 has 64 divisors (see below), whose sum is σ = 52369390080. Its totient is φ = 5818815360.

The previous prime is 20402231429. The next prime is 20402231461. The reversal of 20402231454 is 45413220402.

20402231454 is a `hidden beast` number, since 20 + 402 + 231 + 4 + 5 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1000114 + ... + 1020309.

It is an arithmetic number, because the mean of its divisors is an integer number (818271720).

Almost surely, 2^20402231454 is an apocalyptic number.

20402231454 is an abundant number, since it is smaller than the sum of its proper divisors (31967158626).

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

20402231454 is a wasteful number, since it uses less digits than its factorization.

20402231454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020462 (or 2020456 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 20402231454 its reverse (45413220402), we get a palindrome (65815451856).

The spelling of 20402231454 in words is "twenty billion, four hundred two million, two hundred thirty-one thousand, four hundred fifty-four".