21152154304402 has 32 divisors (see below), whose sum is σ = 34758062539200. Its totient is φ = 9574218009600.

The previous prime is 21152154304397. The next prime is 21152154304403. The reversal of 21152154304402 is 20440345125112.

It is not an unprimeable number, because it can be changed into a prime (21152154304403) 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, 112196874 + ... + 112385242.

It is an arithmetic number, because the mean of its divisors is an integer number (1086189454350).

Almost surely, 2^{21152154304402} is an apocalyptic number.

21152154304402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21152154304402 is a deficient number, since it is larger than the sum of its proper divisors (13605908234798).

21152154304402 is a wasteful number, since it uses less digits than its factorization.

21152154304402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209802.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 21152154304402 its reverse (20440345125112), we get a palindrome (41592499429514).

The spelling of 21152154304402 in words is "twenty-one trillion, one hundred fifty-two billion, one hundred fifty-four million, three hundred four thousand, four hundred two".