20291026 has 16 divisors (see below), whose sum is σ = 34954560. Its totient is φ = 8653680.

The previous prime is 20290999. The next prime is 20291053. The reversal of 20291026 is 62019202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20290999) and next prime (20291053).

It is a super-2 number, since 2×20291026² = 823451472265352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20290988 and 20291006.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481 + ... + 6388.

It is an arithmetic number, because the mean of its divisors is an integer number (2184660).

Almost surely, 2^20291026 is an apocalyptic number.

20291026 is a deficient number, since it is larger than the sum of its proper divisors (14663534).

20291026 is a wasteful number, since it uses less digits than its factorization.

20291026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7089.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 20291026 is about 4504.5561379563. The cubic root of 20291026 is about 272.7520368288.

The spelling of 20291026 in words is "twenty million, two hundred ninety-one thousand, twenty-six".