20213469 has 24 divisors (see below), whose sum is σ = 30506112. Its totient is φ = 13374720.

The previous prime is 20213461. The next prime is 20213471. The reversal of 20213469 is 96431202.

It is not a de Polignac number, because 20213469 - 2³ = 20213461 is a prime.

It is a super-2 number, since 2×20213469² = 817168658027922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46684 + ... + 47114.

It is an arithmetic number, because the mean of its divisors is an integer number (1271088).

Almost surely, 2^20213469 is an apocalyptic number.

It is an amenable number.

20213469 is a deficient number, since it is larger than the sum of its proper divisors (10292643).

20213469 is an equidigital number, since it uses as much as digits as its factorization.

20213469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20213469 is about 4495.9391677379. The cubic root of 20213469 is about 272.4040859873.

The spelling of 20213469 in words is "twenty million, two hundred thirteen thousand, four hundred sixty-nine".