21524412154 has 16 divisors (see below), whose sum is σ = 37164456000. Its totient is φ = 9158382144.

The previous prime is 21524412121. The next prime is 21524412157. The reversal of 21524412154 is 45121442512.

It is not an unprimeable number, because it can be changed into a prime (21524412157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5528479 + ... + 5532370.

It is an arithmetic number, because the mean of its divisors is an integer number (2322778500).

Almost surely, 2^21524412154 is an apocalyptic number.

21524412154 is a deficient number, since it is larger than the sum of its proper divisors (15640043846).

21524412154 is a wasteful number, since it uses less digits than its factorization.

21524412154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11060997.

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

Adding to 21524412154 its reverse (45121442512), we get a palindrome (66645854666).

The spelling of 21524412154 in words is "twenty-one billion, five hundred twenty-four million, four hundred twelve thousand, one hundred fifty-four".