21074037 has 8 divisors (see below), whose sum is σ = 28129920. Its totient is φ = 14033760.

The previous prime is 21074023. The next prime is 21074051. The reversal of 21074037 is 73047012.

It is an interprime number because it is at equal distance from previous prime (21074023) and next prime (21074051).

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

It is not a de Polignac number, because 21074037 - 2⁷ = 21073909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21073998 and 21074016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21074057) 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, 264 + ... + 6497.

It is an arithmetic number, because the mean of its divisors is an integer number (3516240).

Almost surely, 2^21074037 is an apocalyptic number.

It is an amenable number.

21074037 is a deficient number, since it is larger than the sum of its proper divisors (7055883).

21074037 is a wasteful number, since it uses less digits than its factorization.

21074037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7803.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 21074037 is about 4590.6466864702. The cubic root of 21074037 is about 276.2162634968.

It can be divided in two parts, 210 and 74037, that added together give a palindrome (74247).

The spelling of 21074037 in words is "twenty-one million, seventy-four thousand, thirty-seven".