21154522010404 has 48 divisors (see below), whose sum is σ = 37355234144256. Its totient is φ = 10481797872000.

The previous prime is 21154522010399. The next prime is 21154522010429. The reversal of 21154522010404 is 40401022545112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3467382954 + ... + 3467389054.

It is an arithmetic number, because the mean of its divisors is an integer number (778234044672).

Almost surely, 2^{21154522010404} is an apocalyptic number.

It is an amenable number.

21154522010404 is a deficient number, since it is larger than the sum of its proper divisors (16200712133852).

21154522010404 is a wasteful number, since it uses less digits than its factorization.

21154522010404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13036 (or 13034 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

Adding to 21154522010404 its reverse (40401022545112), we get a palindrome (61555544555516).

The spelling of 21154522010404 in words is "twenty-one trillion, one hundred fifty-four billion, five hundred twenty-two million, ten thousand, four hundred four".