20401432402 has 8 divisors (see below), whose sum is σ = 32956160076. Its totient is φ = 9416045712.

The previous prime is 20401432399. The next prime is 20401432463. The reversal of 20401432402 is 20423410402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19326838441 + 1074593961 = 139021^2 + 32781^2 .

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, 392335213 + ... + 392335264.

Almost surely, 2^20401432402 is an apocalyptic number.

20401432402 is a deficient number, since it is larger than the sum of its proper divisors (12554727674).

20401432402 is a wasteful number, since it uses less digits than its factorization.

20401432402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784670492.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20401432402 its reverse (20423410402), we get a palindrome (40824842804).

The spelling of 20401432402 in words is "twenty billion, four hundred one million, four hundred thirty-two thousand, four hundred two".