20292690 has 32 divisors (see below), whose sum is σ = 53130816. Its totient is φ = 4919360.

The previous prime is 20292683. The next prime is 20292697. The reversal of 20292690 is 9629202.

It is an interprime number because it is at equal distance from previous prime (20292683) and next prime (20292697).

It is a super-2 number, since 2×20292690² = 823586534872200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (20292697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30417 + ... + 31076.

It is an arithmetic number, because the mean of its divisors is an integer number (1660338).

Almost surely, 2^20292690 is an apocalyptic number.

20292690 is an abundant number, since it is smaller than the sum of its proper divisors (32838126).

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

20292690 is a wasteful number, since it uses less digits than its factorization.

20292690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61514.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 20292690 is about 4504.7408360526. The cubic root of 20292690 is about 272.7594924561.

The spelling of 20292690 in words is "twenty million, two hundred ninety-two thousand, six hundred ninety".