20467642 has 8 divisors (see below), whose sum is σ = 33063156. Its totient is φ = 9446592.

The previous prime is 20467639. The next prime is 20467669. The reversal of 20467642 is 24676402.

It can be written as a sum of positive squares in 2 ways, for example, as 19793601 + 674041 = 4449^2 + 821^2 .

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

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, 393583 + ... + 393634.

Almost surely, 2^20467642 is an apocalyptic number.

20467642 is a deficient number, since it is larger than the sum of its proper divisors (12595514).

20467642 is a wasteful number, since it uses less digits than its factorization.

20467642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787232.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 20467642 is about 4524.1178145579. The cubic root of 20467642 is about 273.5411094510.

The spelling of 20467642 in words is "twenty million, four hundred sixty-seven thousand, six hundred forty-two".