20019650 has 48 divisors (see below), whose sum is σ = 43497216. Its totient is φ = 6712320.

The previous prime is 20019647. The next prime is 20019661. The reversal of 20019650 is 5691002.

It is a super-2 number, since 2×20019650² = 801572772245000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15842 + ... + 17058.

It is an arithmetic number, because the mean of its divisors is an integer number (906192).

Almost surely, 2^20019650 is an apocalyptic number.

20019650 is an abundant number, since it is smaller than the sum of its proper divisors (23477566).

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

20019650 is a wasteful number, since it uses less digits than its factorization.

20019650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283 (or 1278 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 20019650 is about 4474.3323524298. The cubic root of 20019650 is about 271.5306297385.

The spelling of 20019650 in words is "twenty million, nineteen thousand, six hundred fifty".