21907034 has 8 divisors (see below), whose sum is σ = 33748788. Its totient is φ = 10657440.

The previous prime is 21907027. The next prime is 21907087. The reversal of 21907034 is 43070912.

It can be written as a sum of positive squares in 2 ways, for example, as 20729809 + 1177225 = 4553^2 + 1085^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21906994 and 21907012.

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, 147947 + ... + 148094.

Almost surely, 2^21907034 is an apocalyptic number.

21907034 is a deficient number, since it is larger than the sum of its proper divisors (11841754).

21907034 is a wasteful number, since it uses less digits than its factorization.

21907034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296080.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 21907034 is about 4680.4950592859. The cubic root of 21907034 is about 279.8086873408.

Adding to 21907034 its reverse (43070912), we get a palindrome (64977946).

The spelling of 21907034 in words is "twenty-one million, nine hundred seven thousand, thirty-four".