21150155092 has 24 divisors (see below), whose sum is σ = 40793840640. Its totient is φ = 9514594560.

The previous prime is 21150155087. The next prime is 21150155111. The reversal of 21150155092 is 29055105112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2473492 + ... + 2482027.

It is an arithmetic number, because the mean of its divisors is an integer number (1699743360).

Almost surely, 2^21150155092 is an apocalyptic number.

21150155092 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21150155092 is a deficient number, since it is larger than the sum of its proper divisors (19643685548).

21150155092 is a wasteful number, since it uses less digits than its factorization.

21150155092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4955631 (or 4955629 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 31.

The spelling of 21150155092 in words is "twenty-one billion, one hundred fifty million, one hundred fifty-five thousand, ninety-two".