20357004 has 12 divisors (see below), whose sum is σ = 47499704. Its totient is φ = 6785664.

The previous prime is 20357003. The next prime is 20357009. The reversal of 20357004 is 40075302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20357004² = 828815223712032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20357003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848197 + ... + 848220.

Almost surely, 2^20357004 is an apocalyptic number.

It is an amenable number.

20357004 is an abundant number, since it is smaller than the sum of its proper divisors (27142700).

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

20357004 is a wasteful number, since it uses less digits than its factorization.

20357004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696424 (or 1696422 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 20357004 is about 4511.8736684442. The cubic root of 20357004 is about 273.0473424853.

The spelling of 20357004 in words is "twenty million, three hundred fifty-seven thousand, four".