21901198033 has 16 divisors (see below), whose sum is σ = 25741800000. Its totient is φ = 18370255680.

The previous prime is 21901198031. The next prime is 21901198043. The reversal of 21901198033 is 33089110912.

It is a cyclic number.

It is not a de Polignac number, because 21901198033 - 2¹ = 21901198031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21901197983 and 21901198001.

It is not an unprimeable number, because it can be changed into a prime (21901198031) 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, 290718 + ... + 358216.

It is an arithmetic number, because the mean of its divisors is an integer number (1608862500).

Almost surely, 2^21901198033 is an apocalyptic number.

It is an amenable number.

21901198033 is a deficient number, since it is larger than the sum of its proper divisors (3840601967).

21901198033 is a wasteful number, since it uses less digits than its factorization.

21901198033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69792.

The product of its (nonzero) digits is 11664, while the sum is 37.

The spelling of 21901198033 in words is "twenty-one billion, nine hundred one million, one hundred ninety-eight thousand, thirty-three".