20307477 has 8 divisors (see below), whose sum is σ = 27108864. Its totient is φ = 13522208.

The previous prime is 20307467. The next prime is 20307509. The reversal of 20307477 is 77470302.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20307477 - 2⁴ = 20307461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20307407) 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, 693 + ... + 6410.

It is an arithmetic number, because the mean of its divisors is an integer number (3388608).

Almost surely, 2^20307477 is an apocalyptic number.

It is an amenable number.

20307477 is a deficient number, since it is larger than the sum of its proper divisors (6801387).

20307477 is an equidigital number, since it uses as much as digits as its factorization.

20307477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8059.

The product of its (nonzero) digits is 8232, while the sum is 30.

The square root of 20307477 is about 4506.3818080584. The cubic root of 20307477 is about 272.8257283821.

Adding to 20307477 its reverse (77470302), we get a palindrome (97777779).

The spelling of 20307477 in words is "twenty million, three hundred seven thousand, four hundred seventy-seven".