20501026 has 16 divisors (see below), whose sum is σ = 37848384. Its totient is φ = 8110224.

The previous prime is 20501023. The next prime is 20501029. The reversal of 20501026 is 62010502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20501023) and next prime (20501029).

It is not an unprimeable number, because it can be changed into a prime (20501021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56140 + ... + 56503.

It is an arithmetic number, because the mean of its divisors is an integer number (2365524).

Almost surely, 2^20501026 is an apocalyptic number.

20501026 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20501026 is a deficient number, since it is larger than the sum of its proper divisors (17347358).

20501026 is a wasteful number, since it uses less digits than its factorization.

20501026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112665.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20501026 is about 4527.8058703968. The cubic root of 20501026 is about 273.6897495336.

Adding to 20501026 its reverse (62010502), we get a palindrome (82511528).

The spelling of 20501026 in words is "twenty million, five hundred one thousand, twenty-six".