21841303551 has 16 divisors (see below), whose sum is σ = 29692988640. Its totient is φ = 14275647360.

The previous prime is 21841303511. The next prime is 21841303591. The reversal of 21841303551 is 15530314812.

It is an interprime number because it is at equal distance from previous prime (21841303511) and next prime (21841303591).

It is not a de Polignac number, because 21841303551 - 2²² = 21837109247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21841303511) 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, 169845 + ... + 269313.

It is an arithmetic number, because the mean of its divisors is an integer number (1855811790).

Almost surely, 2^21841303551 is an apocalyptic number.

21841303551 is a deficient number, since it is larger than the sum of its proper divisors (7851685089).

21841303551 is a wasteful number, since it uses less digits than its factorization.

21841303551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100906.

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 21841303551 in words is "twenty-one billion, eight hundred forty-one million, three hundred three thousand, five hundred fifty-one".