20403772 has 6 divisors (see below), whose sum is σ = 35706608. Its totient is φ = 10201884.

The previous prime is 20403763. The next prime is 20403811. The reversal of 20403772 is 27730402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2550468 + ... + 2550475.

Almost surely, 2^20403772 is an apocalyptic number.

It is an amenable number.

20403772 is a deficient number, since it is larger than the sum of its proper divisors (15302836).

20403772 is a wasteful number, since it uses less digits than its factorization.

20403772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5100947 (or 5100945 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 20403772 is about 4517.0534643725. The cubic root of 20403772 is about 273.2562814078.

The spelling of 20403772 in words is "twenty million, four hundred three thousand, seven hundred seventy-two".