20798746 has 4 divisors (see below), whose sum is σ = 31198122. Its totient is φ = 10399372.

The previous prime is 20798731. The next prime is 20798759. The reversal of 20798746 is 64789702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64789702 = 2 ⋅32394851.

It can be written as a sum of positive squares in only one way, i.e., 14523721 + 6275025 = 3811^2 + 2505^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5199685 + ... + 5199688.

Almost surely, 2^20798746 is an apocalyptic number.

20798746 is a deficient number, since it is larger than the sum of its proper divisors (10399376).

20798746 is a wasteful number, since it uses less digits than its factorization.

20798746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10399375.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 20798746 is about 4560.5642194799. The cubic root of 20798746 is about 275.0082465847.

The spelling of 20798746 in words is "twenty million, seven hundred ninety-eight thousand, seven hundred forty-six".