20351004 has 48 divisors (see below), whose sum is σ = 49437696. Its totient is φ = 6508800.

The previous prime is 20350991. The next prime is 20351017. The reversal of 20351004 is 40015302.

It is an interprime number because it is at equal distance from previous prime (20350991) and next prime (20351017).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84324 + ... + 84564.

It is an arithmetic number, because the mean of its divisors is an integer number (1029952).

Almost surely, 2^20351004 is an apocalyptic number.

It is an amenable number.

20351004 is an abundant number, since it is smaller than the sum of its proper divisors (29086692).

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

20351004 is a wasteful number, since it uses less digits than its factorization.

20351004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20351004 is about 4511.2087072092. The cubic root of 20351004 is about 273.0205139625.

Adding to 20351004 its reverse (40015302), we get a palindrome (60366306).

The spelling of 20351004 in words is "twenty million, three hundred fifty-one thousand, four".