20246651 has 4 divisors (see below), whose sum is σ = 20330904. Its totient is φ = 20162400.

The previous prime is 20246621. The next prime is 20246657. The reversal of 20246651 is 15664202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15664202 = 2 ⋅7832101.

It is a cyclic number.

It is not a de Polignac number, because 20246651 - 2¹⁴ = 20230267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20246651.

It is not an unprimeable number, because it can be changed into a prime (20246657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41765 + ... + 42246.

It is an arithmetic number, because the mean of its divisors is an integer number (5082726).

Almost surely, 2^20246651 is an apocalyptic number.

20246651 is a deficient number, since it is larger than the sum of its proper divisors (84253).

20246651 is an equidigital number, since it uses as much as digits as its factorization.

20246651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84252.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20246651 is about 4499.6278735024. The cubic root of 20246651 is about 272.5530620794.

The spelling of 20246651 in words is "twenty million, two hundred forty-six thousand, six hundred fifty-one".