20798051 has 2 divisors, whose sum is σ = 20798052. Its totient is φ = 20798050.

The previous prime is 20797999. The next prime is 20798077. The reversal of 20798051 is 15089702.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20798051 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20797999 and 20798017.

It is not a weakly prime, because it can be changed into another prime (20798081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10399025 + 10399026.

It is an arithmetic number, because the mean of its divisors is an integer number (10399026).

Almost surely, 2^20798051 is an apocalyptic number.

20798051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20798051 is an equidigital number, since it uses as much as digits as its factorization.

20798051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 20798051 is about 4560.4880221310. The cubic root of 20798051 is about 275.0051833734.

The spelling of 20798051 in words is "twenty million, seven hundred ninety-eight thousand, fifty-one".