20251402 has 8 divisors (see below), whose sum is σ = 30399012. Its totient is φ = 10118400.

The previous prime is 20251393. The next prime is 20251447. The reversal of 20251402 is 20415202.

It can be written as a sum of positive squares in 2 ways, for example, as 18931201 + 1320201 = 4351^2 + 1149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1002 + ... + 6442.

Almost surely, 2^20251402 is an apocalyptic number.

20251402 is a deficient number, since it is larger than the sum of its proper divisors (10147610).

20251402 is a wasteful number, since it uses less digits than its factorization.

20251402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7304.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20251402 is about 4500.1557750816. The cubic root of 20251402 is about 272.5743791576.

Adding to 20251402 its reverse (20415202), we get a palindrome (40666604).

The spelling of 20251402 in words is "twenty million, two hundred fifty-one thousand, four hundred two".