21192046 has 16 divisors (see below), whose sum is σ = 33102864. Its totient is φ = 10165824.

The previous prime is 21192043. The next prime is 21192091. The reversal of 21192046 is 64029112.

It is a super-2 number, since 2×21192046² = 898205627332232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21192046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21192043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3441 + ... + 7363.

It is an arithmetic number, because the mean of its divisors is an integer number (2068929).

Almost surely, 2^21192046 is an apocalyptic number.

21192046 is a deficient number, since it is larger than the sum of its proper divisors (11910818).

21192046 is a wasteful number, since it uses less digits than its factorization.

21192046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4035.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 21192046 is about 4603.4819430514. The cubic root of 21192046 is about 276.7308833049.

It can be divided in two parts, 211920 and 46, that multiplied together give a triangular number (9748320 = T₄₄₁₅).

The spelling of 21192046 in words is "twenty-one million, one hundred ninety-two thousand, forty-six".