21012094 has 8 divisors (see below), whose sum is σ = 31694760. Its totient is φ = 10447176.

The previous prime is 21012091. The next prime is 21012127. The reversal of 21012094 is 49021012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28989 + ... + 29704.

It is an arithmetic number, because the mean of its divisors is an integer number (3961845).

Almost surely, 2^21012094 is an apocalyptic number.

21012094 is a deficient number, since it is larger than the sum of its proper divisors (10682666).

21012094 is a wasteful number, since it uses less digits than its factorization.

21012094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58874.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 21012094 is about 4583.8950686070. The cubic root of 21012094 is about 275.9453700599.

The spelling of 21012094 in words is "twenty-one million, twelve thousand, ninety-four".