20219499 has 12 divisors (see below), whose sum is σ = 29245216. Its totient is φ = 13461552.

The previous prime is 20219491. The next prime is 20219509. The reversal of 20219499 is 99491202.

It is not a de Polignac number, because 20219499 - 2³ = 20219491 is a prime.

It is a super-2 number, since 2×20219499² = 817656279622002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20219491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11097 + ... + 12789.

Almost surely, 2^20219499 is an apocalyptic number.

20219499 is a deficient number, since it is larger than the sum of its proper divisors (9025717).

20219499 is a wasteful number, since it uses less digits than its factorization.

20219499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026 (or 3023 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 20219499 is about 4496.6097228912. The cubic root of 20219499 is about 272.4311707879.

It can be divided in two parts, 202 and 19499, that added together give a triangular number (19701 = T₁₉₈).

The spelling of 20219499 in words is "twenty million, two hundred nineteen thousand, four hundred ninety-nine".