21007119 has 48 divisors (see below), whose sum is σ = 35108864. Its totient is φ = 10929600.

The previous prime is 21007111. The next prime is 21007123. The reversal of 21007119 is 91170012.

It is not a de Polignac number, because 21007119 - 2³ = 21007111 is a prime.

It is a super-2 number, since 2×21007119² = 882598097360322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21007095 and 21007104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21007111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 344349 + ... + 344409.

Almost surely, 2^21007119 is an apocalyptic number.

21007119 is a deficient number, since it is larger than the sum of its proper divisors (14101745).

21007119 is a wasteful number, since it uses less digits than its factorization.

21007119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 21007119 is about 4583.3523757180. The cubic root of 21007119 is about 275.9235899591.

The spelling of 21007119 in words is "twenty-one million, seven thousand, one hundred nineteen".