21941902 has 8 divisors (see below), whose sum is σ = 33363936. Its totient is φ = 10820592.

The previous prime is 21941879. The next prime is 21941921. The reversal of 21941902 is 20914912.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74998 + ... + 75289.

It is an arithmetic number, because the mean of its divisors is an integer number (4170492).

Almost surely, 2^21941902 is an apocalyptic number.

21941902 is a deficient number, since it is larger than the sum of its proper divisors (11422034).

21941902 is a wasteful number, since it uses less digits than its factorization.

21941902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150362.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 21941902 is about 4684.2183979827. The cubic root of 21941902 is about 279.9570597416.

It can be divided in two parts, 2194 and 1902, that added together give a 12-th power (4096 = 2¹²).

The spelling of 21941902 in words is "twenty-one million, nine hundred forty-one thousand, nine hundred two".