20746402 has 4 divisors (see below), whose sum is σ = 31119606. Its totient is φ = 10373200.

The previous prime is 20746393. The next prime is 20746417. The reversal of 20746402 is 20464702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13771521 + 6974881 = 3711^2 + 2641^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5186599 + ... + 5186602.

Almost surely, 2^20746402 is an apocalyptic number.

20746402 is a deficient number, since it is larger than the sum of its proper divisors (10373204).

20746402 is a wasteful number, since it uses less digits than its factorization.

20746402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10373203.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 20746402 is about 4554.8218406432. The cubic root of 20746402 is about 274.7773492585. Note that the first 3 decimals are identical.

The spelling of 20746402 in words is "twenty million, seven hundred forty-six thousand, four hundred two".