21454004154 has 32 divisors (see below), whose sum is σ = 47950418880. Its totient is φ = 6342646400.

The previous prime is 21454004141. The next prime is 21454004171. The reversal of 21454004154 is 45140045412.

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, 3961449 + ... + 3966860.

It is an arithmetic number, because the mean of its divisors is an integer number (1498450590).

Almost surely, 2^21454004154 is an apocalyptic number.

21454004154 is an abundant number, since it is smaller than the sum of its proper divisors (26496414726).

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

21454004154 is a wasteful number, since it uses less digits than its factorization.

21454004154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7928366.

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 21454004154 its reverse (45140045412), we get a palindrome (66594049566).

The spelling of 21454004154 in words is "twenty-one billion, four hundred fifty-four million, four thousand, one hundred fifty-four".