20602971 has 8 divisors (see below), whose sum is σ = 30522960. Its totient is φ = 13735296.

The previous prime is 20602961. The next prime is 20602991. The reversal of 20602971 is 17920602.

It is not a de Polignac number, because 20602971 - 2²¹ = 18505819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 763073 = 20602971 / (2 + 0 + 6 + 0 + 2 + 9 + 7 + 1).

It is not an unprimeable number, because it can be changed into a prime (20602961) 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, 381510 + ... + 381563.

It is an arithmetic number, because the mean of its divisors is an integer number (3815370).

Almost surely, 2^20602971 is an apocalyptic number.

20602971 is a deficient number, since it is larger than the sum of its proper divisors (9919989).

20602971 is an equidigital number, since it uses as much as digits as its factorization.

20602971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763082 (or 763076 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 20602971 is about 4539.0495701193. The cubic root of 20602971 is about 274.1426566353.

The spelling of 20602971 in words is "twenty million, six hundred two thousand, nine hundred seventy-one".