20703090 has 16 divisors (see below), whose sum is σ = 49687488. Its totient is φ = 5520816.

The previous prime is 20703079. The next prime is 20703101. The reversal of 20703090 is 9030702.

It is an interprime number because it is at equal distance from previous prime (20703079) and next prime (20703101).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345022 + ... + 345081.

It is an arithmetic number, because the mean of its divisors is an integer number (3105468).

Almost surely, 2^20703090 is an apocalyptic number.

20703090 is an abundant number, since it is smaller than the sum of its proper divisors (28984398).

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

20703090 is a wasteful number, since it uses less digits than its factorization.

20703090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690113.

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 20703090 is about 4550.0648347029. The cubic root of 20703090 is about 274.5859996430.

Adding to 20703090 its reverse (9030702), we get a palindrome (29733792).

The spelling of 20703090 in words is "twenty million, seven hundred three thousand, ninety".