20627947 has 2 divisors, whose sum is σ = 20627948. Its totient is φ = 20627946.

The previous prime is 20627921. The next prime is 20627963. The reversal of 20627947 is 74972602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20627947 - 2⁷ = 20627819 is a prime.

It is not a weakly prime, because it can be changed into another prime (20627447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10313973 + 10313974.

It is an arithmetic number, because the mean of its divisors is an integer number (10313974).

Almost surely, 2^20627947 is an apocalyptic number.

20627947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20627947 is an equidigital number, since it uses as much as digits as its factorization.

20627947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 20627947 is about 4541.7999735788. The cubic root of 20627947 is about 274.2533885955.

The spelling of 20627947 in words is "twenty million, six hundred twenty-seven thousand, nine hundred forty-seven".