21603326151 has 16 divisors (see below), whose sum is σ = 31481129088. Its totient is φ = 13068712800.

The previous prime is 21603326093. The next prime is 21603326153. The reversal of 21603326151 is 15162330612.

It is not a de Polignac number, because 21603326151 - 2⁷ = 21603326023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21603326153) 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, 587181 + ... + 622886.

It is an arithmetic number, because the mean of its divisors is an integer number (1967570568).

Almost surely, 2^21603326151 is an apocalyptic number.

21603326151 is a deficient number, since it is larger than the sum of its proper divisors (9877802937).

21603326151 is a wasteful number, since it uses less digits than its factorization.

21603326151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210622.

The product of its (nonzero) digits is 6480, while the sum is 30.

Adding to 21603326151 its reverse (15162330612), we get a palindrome (36765656763).

The spelling of 21603326151 in words is "twenty-one billion, six hundred three million, three hundred twenty-six thousand, one hundred fifty-one".