21415148152 has 8 divisors (see below), whose sum is σ = 40153402800. Its totient is φ = 10707574072.

The previous prime is 21415148137. The next prime is 21415148171. The reversal of 21415148152 is 25184151412.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1338446752 + ... + 1338446767.

It is an arithmetic number, because the mean of its divisors is an integer number (5019175350).

Almost surely, 2^21415148152 is an apocalyptic number.

It is an amenable number.

21415148152 is a deficient number, since it is larger than the sum of its proper divisors (18738254648).

21415148152 is a wasteful number, since it uses less digits than its factorization.

21415148152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676893525 (or 2676893521 counting only the distinct ones).

The product of its digits is 12800, while the sum is 34.

Adding to 21415148152 its reverse (25184151412), we get a palindrome (46599299564).

The spelling of 21415148152 in words is "twenty-one billion, four hundred fifteen million, one hundred forty-eight thousand, one hundred fifty-two".