20603970 has 96 divisors (see below), whose sum is σ = 56871360. Its totient is φ = 5365440.

The previous prime is 20603969. The next prime is 20603971. The reversal of 20603970 is 7930602.

It is an interprime number because it is at equal distance from previous prime (20603969) and next prime (20603971).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20603971) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 148161 + ... + 148299.

It is an arithmetic number, because the mean of its divisors is an integer number (592410).

Almost surely, 2^20603970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20603970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28435680).

20603970 is an abundant number, since it is smaller than the sum of its proper divisors (36267390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20603970 is a wasteful number, since it uses less digits than its factorization.

20603970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 20603970 is about 4539.1596138492. The cubic root of 20603970 is about 274.1470874540.

The spelling of 20603970 in words is "twenty million, six hundred three thousand, nine hundred seventy".