20429250 has 32 divisors (see below), whose sum is σ = 50993280. Its totient is φ = 5447600.

The previous prime is 20429249. The next prime is 20429251. The reversal of 20429250 is 5292402.

It is an interprime number because it is at equal distance from previous prime (20429249) and next prime (20429251).

It is a self number, because there is not a number n which added to its sum of digits gives 20429250.

It is not an unprimeable number, because it can be changed into a prime (20429251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12870 + ... + 14369.

It is an arithmetic number, because the mean of its divisors is an integer number (1593540).

Almost surely, 2^20429250 is an apocalyptic number.

20429250 is an abundant number, since it is smaller than the sum of its proper divisors (30564030).

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

20429250 is a wasteful number, since it uses less digits than its factorization.

20429250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27259 (or 27249 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20429250 is about 4519.8727858204. The cubic root of 20429250 is about 273.3699716238.

The spelling of 20429250 in words is "twenty million, four hundred twenty-nine thousand, two hundred fifty".