20674973 has 4 divisors (see below), whose sum is σ = 22554528. Its totient is φ = 18795420.

The previous prime is 20674963. The next prime is 20674981. The reversal of 20674973 is 37947602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20674973 - 2¹² = 20670877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20674943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 939761 + ... + 939782.

It is an arithmetic number, because the mean of its divisors is an integer number (5638632).

Almost surely, 2^20674973 is an apocalyptic number.

It is an amenable number.

20674973 is a deficient number, since it is larger than the sum of its proper divisors (1879555).

20674973 is a wasteful number, since it uses less digits than its factorization.

20674973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879554.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 20674973 is about 4546.9740487493. The cubic root of 20674973 is about 274.4616376550.

The spelling of 20674973 in words is "twenty million, six hundred seventy-four thousand, nine hundred seventy-three".