20451494 has 8 divisors (see below), whose sum is σ = 35059728. Its totient is φ = 8764920.

The previous prime is 20451463. The next prime is 20451511. The reversal of 20451494 is 49415402.

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

It is a congruent number.

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, 730397 + ... + 730424.

It is an arithmetic number, because the mean of its divisors is an integer number (4382466).

Almost surely, 2^20451494 is an apocalyptic number.

20451494 is a deficient number, since it is larger than the sum of its proper divisors (14608234).

20451494 is a wasteful number, since it uses less digits than its factorization.

20451494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460830.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 20451494 is about 4522.3328050908. The cubic root of 20451494 is about 273.4691535318.

Adding to 20451494 its reverse (49415402), we get a palindrome (69866896).

The spelling of 20451494 in words is "twenty million, four hundred fifty-one thousand, four hundred ninety-four".