20651345402 has 8 divisors (see below), whose sum is σ = 31058752800. Its totient is φ = 10298427804.

The previous prime is 20651345389. The next prime is 20651345419. The reversal of 20651345402 is 20454315602.

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, 13621502 + ... + 13623017.

It is an arithmetic number, because the mean of its divisors is an integer number (3882344100).

Almost surely, 2^20651345402 is an apocalyptic number.

20651345402 is a deficient number, since it is larger than the sum of its proper divisors (10407407398).

20651345402 is a wasteful number, since it uses less digits than its factorization.

20651345402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27244900.

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 20651345402 in words is "twenty billion, six hundred fifty-one million, three hundred forty-five thousand, four hundred two".