21506285030 has 32 divisors (see below), whose sum is σ = 42310667520. Its totient is φ = 7835304960.

The previous prime is 21506285027. The next prime is 21506285077. The reversal of 21506285030 is 3058260512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2035175 + ... + 2045714.

It is an arithmetic number, because the mean of its divisors is an integer number (1322208360).

Almost surely, 2^21506285030 is an apocalyptic number.

21506285030 is a deficient number, since it is larger than the sum of its proper divisors (20804382490).

21506285030 is a wasteful number, since it uses less digits than its factorization.

21506285030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4080944.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 21506285030 in words is "twenty-one billion, five hundred six million, two hundred eighty-five thousand, thirty".